The Best Online Slots Sites in 2021: UK Top-Ranked Slot Bonuses

Top Slot sites are equipped with the best Slot bonuses for exclusive games designed by well-liked providers. We will lead you through our updated list and detail how to assess Slot sites for yourself, step-by-step.

Read more


Addiction is a sickness. Gambling addiction shouldn't be taken lightly. Get educated and understand the effects of problem gambling. We aim to inform all our CasinoAlpha customers regarding the harsh reality of gambling addiction through educational and informative guides.

Why access the best Slot sites?

Exclusive casinos often include a wide range of Slot games. We list top choices and teach you the market A-Z and how to pick a great site. CasinoAlpha selections always come accompanied by professional guidance for British gamblers to make smart decisions.

We will:

  • Explain how you'll keep your funds safe in a gambling environment and spot the best providers.
  • Teach you to scan through an online casino game selection with an expert eye to find titles that suit your style and needs.

Top 10 Slot Sites UK

Top 10 Slot Sites UK

You can now find the ten best Slot sites UK, with complete details on relevant casino features, carefully picked and presented by CasinoAlpha professionals:

Top Slot Sites UK Number of Slot Games Average RTP Slots Rate Casino Payout time
PlayOJO +2500 94% 1 day
CasiGO +2000 95.11% 1-2 days
Temple Nile +2000 94.50% 1 day
Ladbrokes +1900 96.20% 1 day
Genesis Casino +1600 96% 3 days
Casilando +1200 92% 2 days
Casimba +1200 96.50% 2 days
Jonny Jackpot +1100 97.50% 3 days +1000 N/A 2 days
LuckyMe Slots +1000 96% 1 day
Read less
Costa Games
Code: COSTAMAX Copied!

Costa Games

220% UP TO £100

Costa Games brings to the table:

A choice between three possible match bonuses, for newly joining British players:

  • 150% up to £28 for a £10 deposit.
  • 200% up to £40 for a £20 deposit.
  • 220% up to £100 for a £30 deposit.
Bonus Opt-in Process:

Complete the registration process, including initial verifications.

Deposit one of the eligible amounts and use the COSTAMAX bonus code.

You can now opt for the promotion.

Promotional Conditions:

The opt-in eligibility period is that of seven days. You can accumulate up to £100 plus the initial value, from using the bonus funds.

The promotion is subject to a 30x wagering requirement, applicable for the bonus sums. Games will contribute differently to your rollover. Video slots PJP, slots, arcade, scratch cards, and keno have a full 100% contribution, Hi-Lo games contribute by 50%, while roulette, blackjack and video poker options don't contribute at all.

We advise you to read the full terms for yourself. You will find them on the Costa Games casino's website.

MasterCard Pay by phone PayPal Visa
1st time UK depositors only. Country restrictions apply. This promotion is valid until 30.9.21 at 23:59. Deposit with code COSTAMAX: £10 for 150% bonus, £20 for 200% bonus or £30 for 220% bonus (max bonus £100). Bonus must be claimed within 7 days. GB wins capped at £100 , exc. PJP win. Wagering req. apply: 30x bonus funds (vary by game); Deposit balance is available for withdrawal at any time. General: Full T&Cs Apply T&C Apply
Code: BAZAAR Copied! New casino


100% UP TO £25 + 25 BONUS SPINS

What you get:

100% up to £25 and 25 bonus spins.

How it works:

Extra spins have a generated value cap of £2.5. The generated amount must be wagered 40x. The spins provide points and 100 points equal £1. The extra spins can be used seven 7 days after they have been received. Wagering requirements for bonus founds are set to 60x plus the bonus, but for the extra spins are set to 40x the generated amount.

How to receive:

The first step is to open an account and verify it. When you deposit more than £10 use the promo code BAZAAR to access this promotion.

Claim this offer and use the information we provide to make more insightful decisions.

MasterCard Visa PayPal
First-time depositors only (18+ UK Only - excluding players based in Northern Ireland). Min Deposit £10. Max Offer: 100% Bonus up to £25 Bonus Plus 25 Free Spins. Promo code: BAZAAR Bonus winnings must be wagered 60x Games bonus winnings will be capped at £100+ original bonus amount. Free Spins are valid for 7 days. Free Spins winnings are credited as bonus funds with 40x wagering. Free Spins winnings are capped at £2.5. Wagering contribution varies by game. We reserve the right to deny bonuses based on abusive bonus activity across sites operated by the Company. Deposit balance is available for withdrawal at any time(UK only). Odds of winning vary between players depending on gaming and deposit activity. General withdrawal restrictions & full T&Cs apply. Valid until 31/12/2021 T&C Apply
The Sun Bingo


The featured casino:

The Sun Bingo is an online casino licenced by the UKGC and the Alderney Gambling Control. It has more than 15 years of activity in the bingo and casino sectors.

Pros: Minimum withdrawal is set at £5; high-rated apps for iPhone and Android phones.

Cons: Max cashouts for PayPal are only £5500.

Here comes the promotion:

Your first days as a The Sun Bingo player may come with £10 on bingo games, without deposit. Afterwards, deposit and spend £10 on bingo tickets to redeem an up to £10 bingo offer.

What to know before setting out:

The promotional funds impose 4x wagering, whether they require a deposit or not. Remember that the offers are claimable until 31st of December 2021. The casino has no tolerance for group betting, nor for duplicate accounts. All promotions are available once per account and IP address.

Maestro PayPal Paysafecard Visa Visa Electron
£10 Free: New customers only. Offer runs until 31/12/2021. Opt in, agree to receive promotional marketing, enter the One Time Code and claim a £10 Bingo Bonus. Bonus non-withdrawable, valid for 7 days & has 4 x wagering that must be completed in this time. 1 bonus per player. Deposit £10 Play With £20: New customers only. Offer runs until 31/12/2021. Players must deposit and spend £10 cash on bingo. Min £10 deposit. £10 bonus is a bingo bonus which must be wagered x4 before withdrawal. Bonus expires 7 days after receipt if not used entirely. T&C Apply
The Sun Vegas

100% UP TO £300 + 20 SPINS

The promotion:

When you become a new Sun Vegas member and deposit, you are up for a 100% up to £300 bonus + 20 rotations usable on Buffalo Blitz 2, Age of the Gods, and Grease.

How to get it on your balance:
  • Enter Sun Vegas from our website;
  • Create a new account;
  • Verify your identity;
  • Deposit £10 with any method except Skrill Moneybookers and PayPal;
  • Press the ‘Accept’ button when the bonus pop-up appears.
Keep this in mind:
  • The offer runs until 31/12/2021;
  • You have 30 days to wager your promotional funds;
  • You must wager your deposit and promo funds 50 times;
  • The spins require 40x wagering.

For more information, you can also consult the casino’s Terms and Conditions page.

MasterCard Paysafecard Visa
New Customers Only. 100% Deposit Match up to £300. Min deposit £10. 50x Wagering applies to the Bonus + Deposit amount, playable on selected slots only. Wager £10 cash on any slot to receive 20 free spins for selected slots (20p per spin). winnings from free spins have 40x wagering. Bonuses must be accepted within 72 hours and are valid for 30 days and wagering requirement must be completed in this time. Bonus amount can't be withdrawn. Max bet restrictions apply. Not all games contribute equally to wagering requirements. Deposits made with Neteller and Skrill are not valid for this promotion. Play responsibly. T&C Apply
Just Added



This is what you get:

£50 + 20 extra rounds to play on Eye of Horus

Offer terms:
  • The rounds are available only on the game: Eye of Horus;
  • The bonus comes with a wagering requirement of 40, while the extra spins have no wagering requirements;
  • Each round is valued at £0.10;
  • The minimum deposit is £10.
Assitance for this promotion:

Go to the Coral casino website and press the ‘Join’ button. Then, fill in your personal details, like name, address, phone number, username or password of choice. In order to be able to access your account, you must perform a KYC check. This means that you will have to upload the requested documents to be verified by the Coral casino team. After that, you can claim your offer!

Claim your bonus and gamble responsibly!

Maestro MasterCard Visa
18+. New customers only. Min spend £10 on qualifying games. Certain deposit types excluded. £50 Bonus on selected games subject to 40x wager req. Free Spins for selected game only value 10p each. Must accept within 7 days, valid for 30 days. Player restrictions and T&Cs apply T&C Apply
Just Added


BET £10, GET £50

Coral casino offers you:

£50 on your first deposit of £10.

Remember that:
  • Neteller, PayPal, Apple Pay, Skrill Moneybookers, Paysafe, Skrill or pre-payment cards are not accepted for this bonus;
  • This offer applies to Casino Games, Slots and Live Casino Games. However, you should check the restricted games within the T&Cs section;
  • In order to make a withdrawal, you must wager the bonus 40 times;
  • You must claim this bonus within 14 days of your registration;
  • The minimum deposit amount is £10
How to claim the bonus

To benefit from this promotion, you must make an account at Coral casino. To do so, click on our offer link and, then, press ‘Join’. The registration is a 3-step process. You will need to jot down your personal data. It may include country of residence, e-mail, username, password, full name, address, phone number and so on. After writing all these details, you must go through the KYC check. In order to confirm your account, your account will ask for personal documents to attest your age, address and bank account. Afterwards, you can claim this promotion!

Don't forget to use responsible gambling tools!

Maestro MasterCard Visa
18+. New customers only. Min spend £10 on qualifying games. Certain deposit types excluded. £50 Bonus on selected games subject to 40x wager req. Must accept within 7 days, valid for 30 days. Player restrictions and T&Cs apply T&C Apply
Just Added


WAGER £10, GET £70

Get to know the offer:

As a new BetVictor member, you may receive multiple bonuses, totalling £70. They consist of the following:

  1. £20 to use on IGT's Cleopatra II;
  2. £20 for Game Shows: Crazy Time, Dream Catcher, and Mega Ball;
  3. £10 on BetVictor Branded Megaways;
  4. £10 on Live Casino BetVictor Roulette;
  5. £10 available on Monopoly Live.
Follow these steps:
  • Create a new BetVictor account;
  • Opt in;
  • Deposit and use £10 on casino and live dealer products.

However, Baccarat games will not help you redeem this offer.

The core rules to know:

You can qualify for this only by card deposits. The slot bonus will require 35x wagering. The other two promotions come with 40x staking conditions. The maximum you can withdraw from this promotional bundle is £1750.

For all additional details, please consult BetVictor's Terms and Conditions page.


Maestro MasterCard Visa Visa Direct
18+ new customers only. Opt in and wager £10 within 7 days of registering. Receive 2 x £20 bonuses and 3 x £10 bonuses for selected games with up to 40x wagering. Bonuses expire in 7 days. Card payments only. Max redeemable £1,750. T&Cs apply, see below. | Please gamble responsibly T&C Apply
Simba Slots
Just Added

Simba Slots


Meet the casino:

Simba Slots is a Jumpman Gaming Limited brand. It runs on a custom-made platform, bearing the Jumpman trademark.

Pros: 1000+ slots from providers like Microgaming and Pragmatic Play; loyalty system that includes all players and is attainable.

Cons: No live chat support.

What awaits you:

As a new player, you are up for 20 registration spins. They activate when you add a valid debit card. After depositing, you may also receive a spin on the Safari Chest. The possible bonuses are:

  • Amazon vouchers;
  • 20 rounds on Fruit Party;
  • 500 Starburst turns.
What to know:

Both promotions ask you to wager the resulting funds 65 times. You cannot withdraw more than £50 from the no deposit offer and £250 from the deposit-based promotion. You must complete the verification procedure before completing a withdrawal, and all ID-based identification will go to a secure link. It's possible to wager with both promotional and real funds, but only the first will help you progress through the offer.

MasterCard Pay by phone PayPal Paysafecard Visa
New players only, no deposit required, valid debit card verification required, £8 max win per 10 spins, max bonus conversion £50, 65x wagering requirement. Min deposit £10.00, £8.00 max win per 10 spins, max bonus equal to lifetime deposits (up to £250.00), 65x wagering requirements. T&C Apply
Just Added



What you are up for:

BetVictor has four bonuses in one for you:

  • £10 on slots;
  • £10 live casino bonus to use on BetVictor Roulette and BetVictor Blackjack;
  • £10 to stake in Game Shows: Monopoly Live, Dream Catcher, Mega Ball, and Crazy Time are compatible with this offer;
  • 100 extra rotations to use on selected slots.
The steps towards redemption:
  • Visit the casino from our website;
  • Create a new account;
  • Opt in;
  • Deposit and wager £10 on casino and live casino games.

You have one week to fulfill the last condition. Wagers on Baccarat will not help you claim the promotion.

Remember this:

Only card payments are accepted. The bonus rounds have no wagering requirements, and they are available for 7 days. The promotional funds for slots come with 35x conditions, while the other bonuses impose 40x staking. All these offers will also expire in 7 days. You cannot withdraw more than £750 total from them.

To get a clearer picture of the casino and its promotional rules, we suggest visiting its T&Cs page.

Maestro MasterCard Visa Visa Direct
18+ new customers only. Deposit, opt in and wager £10 on selected games within 7 days of opening new account. Get 3 x £10 bonuses for selected games with up to 40x wagering plus 100 Free Spins. Bonuses expire in 7 days. Max redeemable from bonuses £750. 100 Free Spins have no wagering and expire in 7 days. Card payments only. T&C's Apply, see below. Please Gamble Responsibly T&C Apply
Your Favorite Casino
Just Added New casino

Your Favorite Casino


How's the casino?

Your Favorite Casino is a Jumpman Gaming Limited website. True to its brand, it has an accessible custom-made platform.

Pros: A Pay via Phone banking option; more than 1000 games from providers like Microgaming and Pragmatic Play.

Cons: No live chat feature.

What you're up for:

Firstly, 20 no deposit rotations on Starburst. Moving on to depositing, you may get a spin on the Mega Reel. By using it, you could receive:

  • Amazon vouchers;
  • Dozens of rounds on Fluffy Favourites;
  • 500 Starburst rotations.
Be aware:

Both promotions come with 65x winnings for the spins' turnover. Furthermore, the maximum you can withdraw overall is £50 for the no deposit turns. For the deposit offer, you may withdraw a maximum of £250 or the equivalent of your lifetime deposits. Although only bonus funds will contribute to your staking condition, it's possible to wager on both your real and promotional credit. Debit card verification is necessary for all on-site promotions, even deposit-free ones. You can unlock trophies from the moment you register on this platform.


Maestro MasterCard Pay by phone PayPal Paysafecard Visa
New Players Only. No Deposit: No Deposit Required, Valid Debit Card Verification Required, £8 Max Win per 10 Spins, Max Bonus Conversion £50, 65X Wagering Requirement. First Deposit: Min. Dep. £10, £8 Max. Win per 10 Spins, Max. Bonus Conversion Equal to Lifetime Deposits (up to £250). 65X Wagering Requirement Applies T&C Apply
Just Added


100% UP TO £300 + 200 BONUS SPINS

21Prive info

Launched in 2014, this White Hat Gaming Ltd brand is the home of over 2000 casino games from recognised UK software suppliers.

Pros: 24/7 support, numerous payment methods.

Cons: no mobile apps.

What you land on:
  • 1st cash-in: 100% match bonus up to £300 + 200 extra rounds on Starburst or Gonzo’s Quest.
  • 2nd deposit: 75% match bonus up to £300.
  • Deposit number 3: 50% match bonus up to £300.
  • On the 4th top-up: 25% up to £300.
  • The 5th deposit: 100% match bonus up to £100.
Essential information:
  1. Deposit more than £20 and place bets that do no exceed £5 in bonus funds.
  2. Spins will be credited as 40 per day over five days.
  3. All bonuses expire after 30 days, and extra rounds are only valid for 10 days.
  4. Only Slots, Scratch Cards and Keno contribute to the bonus playthrough.
  5. For identity checks, personal documents are verified in up to 48 hours.
  6. The multilingual Live Chat can help users in Finnish, French, German, Spanish, and more.
  7. When you redeem 1000 loyalty points at 21Prive, you receive £5 in cash funds.
Bank Transfer Maestro MasterCard Neosurf Neteller PayPal
New Players only. One bonus offer per player. Minimum deposit of £20 Max bonus bet £5 Bonus funds must be used within 30 days and bonus spins within 10 days, otherwise any unused shall be removed. 200 Bonus spins are valid on the following games only: Gonzo’s Quest and Starburst. Bonus spins to be credited at a rate of 40 bonus spins per day over five days, triggered on your first deposit. Bonus spins winnings credited in the form of bonus funds and capped at £100 Bonus match offers are 100% of your first deposit up to £300, 75% of your second deposit up to £300, 50% of your third deposit up to £300, 25% of your fourth deposit up to £300, 100% of your fifth deposit up to £100 Bonus funds are separate to Cash funds and are subject to 35x wagering on the your bonus funds only T&C Apply
Jackpot Mobile Casino


Jackpot Mobile Casino facts:

The UK platform was launched in 2015 and it was developed by Grace Media Limited.

Pros: Android app available, 24/7 customer support, various responsible gambling tools.

Cons: Extensive withdrawal request approval, no apps for iOS or Desktop.

The offer:
  • £5 upon registration on Shamrock N Roll, Mayan Marvels and Candy Swap.
  • 1st deposit – 200% up to £50 and 50 extra spins on Starburst;
  • 2nd deposit – 100% up to £200;
  • 3rd deposit – 50% up to £250.
Keep in mind:
  • The extra spins on Starburst are worth 10p and are activated when the game is launched;
  • You may only transfer 4 times the bonus amount into real funds;
  • Withdrawal requests can take up to 72 hours to be approved;
  • Certain payments can incur different fees, depending on the payment method chosen;
  • Generally, you may use bonuses within 28 days since activation and extra spins within 7 days since receiving it.
Boku Maestro MasterCard Neteller PayPal Skrill Moneybookers
New players only. £5 sign up bonus is on Shamrock N Roll, Mayan Marvels & Candy Swap Slots available Max conversion £20. No deposit required. 100x wagering. SMS validation req. For £500 welcome bonus First 3 deposits only. Min dep. £10, Max bonus £500 + 50 free spins on Starburst (on 1st deposit) . 4x conversion. 40x Wagering. Subject to Jackpot Mobile Casino's Bonus policies T&C Apply
Avenger Slots


What's in store for you:

Newly registered players on Avenger Slots get to spin the Mega Reel at their first deposit, which may yield them up to 500 extra spins to play with.

Claim it so easily:
  1. Create your new casino account.
  2. Deposit an amount greater than £10.
  3. A pop-up will open. Accept the bonus.
  4. Spin the Mega Reel and see what you've got.
A few more things to know:
  • The Mega Reel is a game of chance and therefore winning a prize is not guaranteed.
  • You may be awarded Amazon vouchers. They will be e-mailed to the address provided at sign-up.
  • Irrespective of the number of extra spins you may get, they are capped at £8 per 10 spins.
  • For example, should you accrue £8 from 2 spins, the other 6 are forfeited.
  • You must complete a wagering requirement of 65x to cashout any winnings.
  • Wagers will draw first from your real funds, then from the bonus balance.
  • Roulette, Blackjack and Jackpot games do not contribute to the wagering requirement.

Pay Avenger Slots a visit and skim through the Terms before you claim your Mega Reel.

Maestro MasterCard Pay by phone PayPal Paysafecard Visa
New Players Only, Min Deposit £10, £8 Max Win Per 10 Spins, Max Bonus Conversion £250, 65x Wagering Requirements T&C Apply


77 BONUS SPINS + 100% UP TO £200

An overview of 777:

777 casino is licensed by UKGC, MGA, Gibraltar, and Ireland's Revenue Commissioners as part of the 888 Group.

Pros: retro and intuitive interface, many responsible gambling tools, fast withdrawals

Cons: no live chat available

As a welcome, you may access:

100% up to £200 + 77 bonus rounds.

You should know:
  • If you deposit using Skrill and Neteller, you will not be eligible for the bonus;
  • You may access the casino on iOS and Android-operated devices by downloading the mobile apps;
  • The casino offers you the chance to choose between more than 1200 slots;
  • You’ll be able to contact customer support using the phone number and email offered on the Support page of the site;
  • 777 casino shares its VIP scheme with 888casino, one of the most renowned gambling platforms in the industry.
Apple Pay AstroPay Card ecoPayz MasterCard Neosurf PayPal
New players only • No Deposit Offer: Claim in 48 hrs • 14 day expiry • Free Spins (FS) wins credited as bonus & capped at £10, excl. JP win • Deposit Bonus Offer: FreePlay (FP) wins credited as bonus & capped at amount received, exc. JP win • Valid for selected games • Bonus wins capped at £500, excl. JP wins • Pre-1st deposit only: Bonus wins & max redeemable amount capped at £100, excl. JP wins • 50x wagering - req. vary by game • Bonus expires in 90 days • Payment method & country restrictions apply • Withdrawal restrictions & T&Cs apply: No Deposit Offer & Deposit Offer T&C Apply

100% UP TO £50

Basic facts about TradaCasino 

TradaCasino greets you with a wide palette of game options, many responsible gaming tools and a well-structured website!

Pros: UKGC and MGA licenses, FAQ section, Live Chat and e-mail support.

Cons: No telephone assistance.

This is what you get:
  1. 1st deposit: 100% up to £50;
  2. 2nd deposit: 50 extra rounds on Starburst;
  3. 3rd deposit: 50 extra rounds on Starburst;
  4. 4th deposit: 50 extra rounds on Starburst.
TradaCasino is the place where:
  • Players can enjoy a Blog section filled with top news in the industry;
  • You can find over 900 Slot games and 100 Live Casino games;
  • This bonus must be wagered 35 times before withdrawal;
  • The maximum bet for this offer is £3.99;
  • You get safe and reliable play through UKGC and MGA certifications;
  • The spins come with a minimum deposit requirement of £20.
Visa Neteller MasterCard Skrill Moneybookers Bank Transfer Sofort Banking
18+. New players only. Bonus spread over 1st 4 deposits. Spins applied in batches of 50 on the 2nd, 3rd and 4th. 1st 100%. Min deposit £10. Max bonus £50. 2nd, 3rd and 4th min deposit min deposit £20. 35x wager on bonus and spins. Spins credited on Starburst and expire after 24h. T&C Apply
Alpha Choice


£88 NO DEPOSIT + 200% UP TO £300

888casino presents itself

The UKGC and MGA regulated casino promises safe and secure play at any time of the day! Here, you get to play your favourite game, while keeping an eye on the budget with the help of various responsible gaming tools.

Pros: autoplay, deposit and time limits, many games

Cons: it has a low loading speed.

With this offer, you will receive:

£88 no deposit + 200% up to £300 on first deposit

As a player at 888casino, you:
  • Can check the Blog section for the latest news in the industry;
  • Get to play exclusive 888casino games;
  • Can register in only a couple of minutes and have a safe experience;
  • Will receive the no deposit bonus within 48 hours.
New players only • No Deposit Offer: Claim in 48 hrs • 14 day expiry • FreePlay (FP) wins credited as bonus & capped at £10, excl. JP wins •50x wagering- req. vary by game • Deposit Offer: £20 min deposit • Valid for selected games • Bonus wins capped at £500, excl. JP wins • Pre-1st deposit only: Bonus wins & max redeemable amount capped at £100, excl. JP wins • 30x wagering - req. vary by game • Bonus expires in 90 days • Payment method & country restrictions apply • Withdrawal terms, No Deposit Offer terms & Deposit Bonus Offer terms apply T&C Apply
Aspers Casino


What's To Be Opted For:

British users can opt for a 100% match first deposit bonus up to £100 and 100 deposit rounds that are usable on Starburst.

How to Opt-in:

Start registering. Once you are done, complete the required verifications. Tap on the cashier tab. Select the minimum deposit amount, and also select the bonus.

What Will Happen:

You receive the match bonus right away. You must wager the bonus and deposit funds 50 times for conversion, which can go up to 5x the promotional amount.

The rounds you will get in ten daily batches. While there is no wagering involved, your resulting funds are capped at £10 per batch.

You know where to find the complete rules and regulations. Go to the Aspers Online casino to find out more.

MasterCard PayPal Paysafecard Visa
New players only. Min deposit £20, Max bonus £100. 50x WR, 100 Free Spins - 10 batches of 10 Free Spins Daily - No WR - Max Win £10 per batch T&C Apply
Monster Casino


Who is Monster Casino:

Is a Grace Media Limited gambling platform licensed by the United Kingdom Gambling Commission which only proves its trustworthiness.

Pros: no monthly cash-out limit, apps for iOS and Android, user-friendly website

Cons: 3day cash-out processing time

Open an account and receive:

The promotion comes on 3 separate deposits of more than £10. For the first deposit, you get 200% up to £50 plus 50 bonus spins on Starburst. For the second deposit, you will be granted 100% up to £200 and for the third 50% up to £250 in bonus.

Aspect to bear in mind:

Each spin has a value set to 10p. Bonus is valid for 28 days after claiming. Live chat is available between 10:00 to 14:00 and between 18:00 to 22:00 GMT. There is also support available via phone and email. The website offers over 600 slot games from multiple providers. You cannot play any games until you finished the KYC procedure.

Boku Maestro MasterCard Neteller PayPal Skrill Moneybookers
New players only. First 3 deposits only. Min dep. £10, Max bonus £500 + 50 spins on Starburst. Selected slots only. 4x conversion. 40x Wagering T&C Apply


What UK Players Opt Into:

A 100% up to £100 first deposit bonus, plus 50 rounds available on the Starburst slot game.

To Opt-in, You Must:
  • Register and complete verifications.
  • Go on the deposit tab.
  • Select your payment method and desired deposit sum.
  • Click on 'Add bonus.'
  • Select the first deposit welcome bonus.
  • Proceed with the transaction.
Offer Essentials:

The bonus is valid for 30 days, while the spins last for 10 days. Grant that, the amount and subsequent funds have a 35x wagering requirement. Different games contribute differently to wagering completion. Don't place bets higher than £5 when wagering the promotion.

Plus, you will lose your bonus if you withdraw while completing the turnover.

Money originating from rounds can go up to £50.


Bank Transfer Maestro MasterCard Neosurf Neteller PayPal
New players only. One bonus offer per player. Minimum deposit of £20 Max bonus bet £5 Bonus funds must be used within 30 days and bonus spins within 10 days, otherwise any unused bonus or spins shall be removed. Bonus spins are valid on Starburst video slot game only. Bonus spins winnings are credited in form of bonus funds and are capped at £50 Bonus funds are 100% of your first deposit up to £100 Bonus funds are separate to Cash funds and are subject to 35 x wagering the total of bonus plus cash funds. Only bonus funds count towards wagering contribution. T&C Apply
Slot Games


The awaiting offer:

Upon joining Slot Games and making your first deposit, you will be granted a spin of the Mega Reel. This can further offer you up to 500 spins on Starburst or other incentives, such as Amazon vouchers.

Claiming it:
  1. Press our offer’s button;
  2. Create an account;
  3. Deposit more than £10.
Keep this in mind:
  • Spin winnings must be wagered 65 times before cashing out;
  • The bonus will be removed if you don't log in for more than 7 days;
  • The maximum bonus conversion is equal to your lifetime deposits (up to £250);
  • The maximum win per 10 spins is £8.

Additional information about this promotion can be found in Slot Games’ terms and conditions.

Maestro MasterCard Pay by phone PayPal Paysafecard Visa
New Players Only, Min Deposit £10, £8 Max Win Per 10 Spins, Max Bonus Equal To Lifetime Deposits (Up To £250), 65x Wagering Requirements T&C Apply

Latest and Best Slots Sites: All in one place

Facts checked Sep 25, 2021 Author:

We will present the most well-known new Slot sites and give a few extra tips on their characteristics and to best approach them as players. We will make an in-depth dive into the essentials of Jackpot Slots so that you know precisely what to expect from them.

Ultimate Slot strategy: protect your wallet in the true step-by-step way

Ultimate Slot strategy, protect your wallet in the true step-by-step way

Our team of gambling professionals has the insight and expertise to provide you with a few careful steps you can take to ensure your funds are protected while playing casino slot games and especially online Slots bonuses.

Your smartest move is managing your budget!

Keep your Slot site game outcome

A most reliable tip when dealing with deposit bonus Slots and other types of casino Slots bonuses is to complete any necessary wagering requirements and cash out any outcome. It can be risky to use any resulted funds again on a slot that may not return favourably.


CasinoAlpha knows that outcomes in gambling may not always be the desired ones, and we have a solution: do not chase your losses. If you find yourself on a losing streak, you can still protect your funds by backing away strategically at the proper time.

Our expert’s advice!

Knowing your limits is essential in gambling, so our experienced experts advise that you always figure out how much you can spend before playing. Stick to this limit, and you can have a proper gambling experience while also securing your funds.

Of course, wise British gamblers keep their funds safe, do not chase losses, and do not spend more than initially planned.


Planning is crucial in any strategy and absolutely indispensable when adequately addressing your budget when playing on new Slot sites or rolling Slots promotions.

But CasinoAlpha will take you a few steps further! Read on and find the most efficient ways to approach the best Slots bonuses like an expert.

Find top providers for top-quality Slots

Step 1 Find top providers for top-quality Slots

The number one indicator of best Slot sites UK is their collaboration with top industry software developers. We did the digging, and here are a few top examples:

Top Slot Sites with Top Providers

Casino NetEnt Games Microgaming games Play N Go games
EnergyCasino +120 +200 +210
21 Casino +60 +60 +60
LeoVegas +40 +80 +40
HeySpin +70 +100 0

The UK gambling industry holds more software developers

  • Evolution Gaming;
  • Yggdrasil;
  • Big Time Gaming;
  • Betsoft;
  • Pragmatic Play;
  • PariPlay;
  • Quickspin;
  • Thunderkick;
  • Elk Studios;
  • Endorphina.
CasinoAlpha approach

In our extensive experience, the best UK casinos can even collaborate with three or four providers as long as their game portfolio is large enough (showing at least over 800 games). They must also be varied enough to accommodate a large number of British players.

Moreover, many top providers are already owned by or collaborate with the ones we listed in our table. We summarised the characteristics of some industry names, so British players can learn to recognise a trustworthy provider when making up their minds about new Slots sites.

Let’s have a quick look!



  • Year of establishment: 2000;
  • Total number of games: +114;
  • Best known for: Starburst, Gonzo’s Quest, Dead or Alive.

NetEnt was first founded as Net Entertainment. After growing exponentially, the company was renamed in 2015 and today employs more than 700 people.

Fun fact

In 2019, NetEnt registered over 58.3 billion gaming transactions and, at present, actively collaborates with more than 200 customers.

Its reliability is shown by NetEnt’s continual collaboration with eCOGRA, a top independent auditor on the online gambling scene when it comes to its variety of games, counting over 200 titles. You can also trust it as perhaps the most encountered provider in new Slot sites UK.


  • Year of establishment: 1994;
  • Total number of games: +800;
  • Best known for: 9 Masks of Fire, Book of Oz, Jurassic World, Lara Croft.


Microgaming has the largest jackpot network in the world and keeps expanding its horizons!

Besides being a gambling industry giant, Microgaming is deeply involved in community causes, investing more than £1.8 million. Its PlayItForward programme counted over 100 volunteers supporting 20 community events for green initiatives, education scholarships and charities in 2019 in the Isle of Man.

Play’n GO

Play n Go

  • Year of establishment: 1997;
  • Total number of games: +220;
  • Best known for: Diamond Vortex, Riddle Reels, Rally 4 Riches, Agent Destiny.

You can keep up with the latest Play’n GO stories on Facebook, Instagram, YouTube, and LinkedIn. They work with BMM Testlabs to ensure their games are up to standard and collaborate with The Independent Betting Adjudication Service (IBAS) as an alternative dispute resolution service (ADR).

The Play’n GO website features useful responsible gambling links. It shows their UKGC and MGA licenses, thus proving to be a trustworthy provider.



  • Year of establishment: 1999;
  • Total number of games: +700;
  • Best known for: Age of the Gods, Green Lantern, Buffalo Blitz, The Matrix, Nostradamus.

Playtech is perhaps one of the largest developers worldwide, with over 6400 employees and offices in more than 24 countries. It also developed the Playtech ONE Wallet that enables gamblers to use one wallet and account for any Playtech game and company they choose.

Our analysis of Slots developers

As our industry is a highly dynamic one, software providers change by the minute, grow, and evolve, and up-and-coming names appear all the time.

This means that new Slots sites continuously come to be, and the best Slots sites on the market update their game selection, software, and more. We know how overwhelming it is to keep up with continuous changes. They imply different technical, economic, and strategic elements.

Get the most from our expertise!

British players don’t need to concern themselves with getting it all on their own. Our CasinoAlpha team is a group of experienced and thoroughly trained experts. They use their diverse backgrounds and complete gambling expertise to stay up-to-date with new Slot sites and the UK gambling industry as a whole.

Our mission?

To scout the market and present to you any details that could impact your gambling experience. Moreover, we test all Slots promotions available. We also keep an eye on existing and new Slots sites, using our expert insight from the vantage point of British players.

We don’t simply show you the right direction!

We give you the tools to make decisions for yourself, explaining our way of analysis and guiding you to assess each online casino and offer for yourself and according to your own needs.


British players can find brand-new online casinos and the latest gambling products on our CasinoAlpha page. We keep you updated and safe by verifying each new site thoroughly and offer, explaining our rating system and offering expert insight on approaching new casinos (including new Slot sites). We aim at protecting your wallet, interpreting RTP rates, and what game types and providers you can expect to find.

Check out the game selection

Step 2 Check out the game selection

Approach Slot Sites UK with Confidence! Our expert-specifics will tell you which casino collaborates with the right software developers.

Do your preferred Slot sites UK provide your favourite games?

We know this can be tricky to answer but working with thousands of Slots sites enables our team of gambling professionals to pinpoint exactly which casino offers the range of games you may be looking for.

Not all Slot sites will have the same interface

Some are user-friendly and present clear buttons and tabs that facilitate navigation. The best Slots sites will have such intuitive gambling platforms, which usually provide a Slots button quite clearly on sight, for players to access their online Slot games quickly.

Most intuitive interfaces provide a search bar

British players who already know the name of their favourite game can simply enter the title and start the session. UK players may often search for the name of their favourite software developer into the search bar and find all the games offered by that developer to the online casino.

Other top Slots sites simply categorise their games into:

  1. Video Slots,
  2. Classic Slots,
  3. Online Slots
  4. By thematic, like Movie Slots, Sports Slots, Fruit Slots, etc.

In this way, British players who have a preferred type of game can easily find it.


There are Slots sites in the UK that don’t make it that easier to access their games. Our research comes in handy regarding this issue. In each of our reviews, we mention the site's usability. We help British players find their way through the more complicated platforms.

This time, we used the knowledge accumulated in over five years of gambling experience to bring to your attention top Slots sites that show common Slot games on the UK market. Read on and see what British players look for nowadays and what these games have in store!

Top 5 Fluffy Favourites Slots sites

Top 5 Fluffy Favourites Slots sites

  1. Betfair
  2. Mega Casino
  3. Novibet
  4. Lord Ping
  5. YakoCasino

Relevant observations on how it works

Our CasinoAlpha professionals tried out the game on multiple sites, in demo and real play Slots modes. We applied extensive gambling knowledge to find its essential features.

  • Game features: Prize Grabber feature triggered when three or more claw symbols appear at the same time + extra rounds feature;
  • RTP: 95.39%;
  • Paylines: 25;
  • Special symbols: pink elephant as a Wild symbol, the claw as Scatter symbol.

Top 5 Slots sites with Book of Dead

Top 5 Slots sites with Book of Dead

A classic choice for a lot of British gamblers, Book of Dead can be found on many top online casinos, such as:

  1. PlayOjo
  2. Videoslots
  3. Paddy Power Games
  4. NYspins
  5. Yeti Casino

The workings of Book of Dead

We made sure to summarise it briefly to lighten your load:

  • Game features: extra rounds feature;
  • RTP: 96.2%;
  • Paylines: 10;
  • Special symbols: Book of Dead bonus rounds Scatter and the Wild symbol.

Top sites with Gonzo’s Quest

  1. STS Casino
  2. Quinnbet
  3. No Bonus Casino
  4. Buzz Bingo
  5. Leo Vegas

Gonzo’s Quest free spins no deposit are quite sought-after by British gamblers. Our page explains its rules and provides an expert guide on casinos offering the game.

What British gamblers can expect from Gonzo’s Quest

  • Game features: Avalanche reels with multipliers + bonus rounds & free falls.
  • RTP: 95.9%;
  • Paylines: 20;
  • Special symbols: different stone symbols signifying different multipliers + question mark as a Wild symbol.

Top sites with Starburst

It is highly likely that a reliable casino listed by CasinoAlpha shows Starburst as a designated game for Slots bonuses. Check out our expert research results:

  2. Party Casino
  3. Race Casino
  4. Ice36
  5. Wink slots

CasinoAlpha ensures that British players can access Starburst free spins UK no deposit deals while still saving their funds. We created a detailed player guide with pro tips on accessing these deals.

Insight into how it works on desktop versus mobile screens

  • Game features: bonus Wilds feature with up to three wild reels;
  • RTP: 96%;
  • Paylines: 10;
  • Special symbols: Starburst Wild symbols, symbols with purple, blue, orange, green, and yellow jewels, and 7s and bar symbols for five-symbol combinations.

How we review slot games

How we review slot games

Here, at CasinoAlpha, we know precisely what elements influence the smooth working of a Slot game and its appropriateness to the British audience.

For instance, a major component of any respectable Slot game is the RTP (Return to Player) rate. Its value shows how many chances British players have of receiving desirable returns. When our team tests and selects the best payout casinos, they always check how fair the game is accordingly by ensuring that the RTP rate is around 90% or more.

We always count the number of paylines

What are paylines?

Paylines are the lines where potential combinations of symbols offer favourable returns if aligned according to game rules. These also influence the outcomes for British players, as the more paylines a game has, the more space there is for the right symbols to align.

We never forget the special features!

Aside from the elements of every good Slot game, we also examine if it offers any special features like:

  • Scatter and wild symbols
  • Pot multipliers
  • Collapsing stacks (or freefalls)
  • Any game feature that affects the gameplay and budget of British gamblers

What are scatter symbols?

Scatter symbols usually depend on the theme and appear in scattered places on the screen when playing. They generally do not do much to influence the game aside from filling up the board.

We encountered many games where scatter symbols offer a bonus round to the player or even a few extra rolls that do not affect the pot.

What are wild symbols?

Wild symbols can replace any winning symbol in a line when needed to complete a combination. They are the Joker card in a Slots game. They can affect British gamblers’ pots by adding to the bet without taking from the players’ funds or adding extra funds to potentially desirable returns.

All such features and others are thoroughly researched and tested by our CasinoAlpha team of professionals. We try them out as any player would use them, judging them based on years of experience and acquired expertise.

That is why our recommendations are safe, exciting, and up-to-date with market preferences and current technologies. However, we do not simply recommend a top-notch collection of games to British gamblers. We also explain how they can use our insight to evaluate a game according to specific individual requirements.

Inside tips for experts: Jackpot slots

Inside tips for experts  Jackpot slots

The CasinoAlpha team of gambling professionals can assure you that any top game selection includes Jackpot Slot games.

These are the most common options:

  • Mega Moolah

Is a Safari-themed Progressive Jackpot Slot with 25 paylines. It displays a randomly triggered bonus feature and offers special options like multipliers, wild symbols, extra spins, and scatter symbols.

We noticed it also has a maximum of 125 for coins.

  • Mega Jackpots Cleopatra

One of IGT's most well-known brands. The title presents five reels, three rows, and twenty paylines of Ancient-Egypt scatter symbols and bonus features of 15 extra games. Returns on these Progressive Slots may be three times the average amount.

Bets range from £0.40 to £600 for each line. If the jackpot exceeds £1000000, the RTP increases from 88.98% to 93.03%.

  • NetEnt’s Mega Fortune

Fun Fact

Its jackpot of €2.6 mil achieved an online casino record in 2020.

The game was launched in 2012 and offers a 96% RTP rate, with five reels, three rows and 25 paylines. The jackpot begins at £150000, and there are three progressive jackpots that British players might potentially access.

  • Rainbow Riches

Is a Jackpot developed by Barcrest in 2009, with a classic outline of five reels and 20 paylines.

The Irish-themed game has an RTP of 95%, and stakes range from £0.20 to £500. It has three bonus features: Pots of Gold, Wishing Well, and Road to Riches that can also be accessed on a mobile app, on Android, Windows, and iOS operating systems.

How to pick a casino slots bonus

Step 3 How to pick a casino slots bonus

Free spins on registration are common offers in online casinos. We explain what bonus bet types you could find and ways to pick the right ones from the full list of top UK deals.

Our CasinoAlpha team uses all their experience with casino slots bonus policies to pinpoint exactly what you need to consider when picking the best Slots bonus.

Put all the pieces together and approach a slots bonus like an expert

So far, you made sure the slots sites you chose work with reliable providers and the game selection you encountered on the websites suits your taste. Now, it’s time to check out the Slots promotions.

Picking the best Slots bonus: A few vital details!

First and foremost, no wagering bonuses are some of the best Slots bonuses as UK players may cash out their results at any point without waiting to meet any casino wagering requirements.

Let us explain:

  1. What these casino bonuses can offer
  2. Their rules and requirements,
  3. Strategies to use them responsibly
  4. Provide complete lists of no wagering deals
  5. Offer games they may apply to on our designated page

Secondly, for the best online Slot bonuses that have wagering conditions attached, there are some main things to look at before committing to an offer.

  • Bonus Availability

Bonus availability is the time frame you are allowed to wager the deal before it expires.

A British Slots player who does not complete wagering requirements before the deposit bonuses availability expires may lose bonus spins. Also, any returns they might get from playing the offer.

  • Minimum Wagering

It’s crucial to look at the minimum number of times a bonus must be wagered before cashing out to see if you might complete the wagering before the bonus availability is up.


  1. The average wagering for slots bonuses is 35 – 40 times the returns.
  2. A reasonable timeframe would last between two days and one week, depending on how big the bonus is.

  • Maximum Bet Allowed

With the purpose of fair gaming, promotional terms should always specify the maximum amount you may bet when playing the best Slot bonus. British gamblers must complete the wagering requirements within a specific timeframe, so it would be neither fair to the casino nor safe for the player to wager the required amount all at once.

Take your wagering into consideration

Our CasinoAlpha team continuously checks which games you may wager your bonus funds. We mention them in our best Slot bonus descriptions.

And just like there are game limitations, British gamblers may need to watch out for payment methods.


  1. Smaller Slots promotions may expire within one day.
  2. You may only access specific deposit bonus Slots by making a payment via a designated payment service. Other deals may not be accessible if you make a deposit using excluded payment methods. These details will always be available in promotional terms or our best Slots bonus descriptions.

The right UK payment methods for best Slots bonuses | Safe pay as a top strategy

Step 4 The right UK payment methods for best Slots bonuses ,Safe pay as a top strategy

Many same day withdrawal casinos offer exclusive Slots bonuses. We list the top reliable sites, explain payout processes, withdrawal restrictions, appropriate payment methods and more on our page.

Our years of research and practice in the gambling industry familiarised us with a wide variety of industries that have an unbreakable influence on a player’s experience. We especially know how crucial it is to take a realistic financial perspective to understand the needs of British gamblers and how they could keep their funds safe.

Crucial element!

Staying secure in your online gambling experience is choosing a payment method that works to the advantage of your finances and time.

Stay with us till the end to determine the most recommended payment services for British gamblers. Learn to find an appropriate payment method when selecting the best Slot sites UK or to deal with online Slots bonuses.

8 secure and common UK payment methods we suggest:

  1. PayPal;
  2. Boku;
  3. Pay by Phone;
  4. Paysafecard;
  5. Skrill Moneybookers;
  6. Neteller;
  7. Visa;
  8. Mastercard.

Learn the reasons behind our recommendations!

  • They are secure and accessible

Most UK online gambling platforms offer at least two or three methods from our list for British gamblers to use when depositing or withdrawing.

  • They are much faster than other methods

E-wallets, in particular, usually have a timeframe of one to two days for processing, while Neteller and Paysafecard can process withdrawals instantly.

The processing speed may vary according to specific identity verification checks required by the casino and the payment provider to complete casino transactions.

  • Payment speed is essential

When dealing with deposit Slots bonuses, as many casinos do not allow British gamblers to withdraw or begin wagering the offer until a successful deposit has been made. This can affect the time received to complete wagering requirements.

  • These payment methods are accepted and often optimised for gambling transactions

They have a strong link with the industry. An exception may be Visa and Mastercard debit cards payments, according to your chosen bank.

Specific banks have regulations against casino transactions that prevent you from withdrawing.

Be aware

Skrill Moneybookers and Neteller deposits may not be compatible with opting for Slots promotions, so be sure to double-check this detail in promotional terms and conditions.

Why trust in CasinoAlpha?

Why trust in CasinoAlpha

Here, at CasinoAlpha, at the top of our list of priorities is the psychological safety, data protection, and fund security of our British readership.

We never list a casino before we test it ourselves!

We go through the registration process like any British gambler would and begin to analyse the casino's most essential features. Our long experience concerning the gambling industry and our diverse expertise enable us to know exactly what to look for when testing out a casino.

The same goes for the best Slots bonuses we list. They are scrutinised, turned over, and carefully selected. British players can rest assured that any gambling product on our site is UKGC-regulated and thus reliable and lawful.

But we do more!

We come to your aid with in-depth guidance for any product we list. We explain in full detail the workings of gambling so that you are equipped to make the right decision for yourself whenever necessary.

In this case, we have presented the best strategy, familiarised you with game providers and common Slot games, presented pro tips and a step-by-step guide to choosing the offer and the online gambling platform that you consider the safest and the most appropriate to your needs and requirements.


We are always here whether you forget some important detail. Come back anytime, and play safe!

Consulted sources

Using her Comparative Literature MA, Ioana’s casino and game reviews, player guides and pages cater to the different culture-related needs, preferences, and mentalities of gamblers around the world. Focused on aesthetic & psychology, she advocates for pleasing yet safe casino experiences.

Did this page help you?