Our organization is free of charge and has a primary object to transmit transparent and accurate information to make financial decisions with confidence.
How we make money
CasinoAlpha has a paid partnership for product placement with all the online casino operators listed on the site. Similarly, we receive money from our partners whenever our users click on certain links. Such compensation does not influence our recommendation, advice, reviews, and analysis. We remain unbiased no matter the collaborations we have.
We bring you a top-quality list of slot sites available in the United Kingdom. Hundreds of hours of our work bring you hundreds of vetted casinos!
Why you should trust us
More info
Why you should trust us
In its effort to incentivise enhancing the online casino quality standards in the UK, CasinoAlpha generated a testing protocol designed explicitly for slots sites.
At least three independent contributors will check all essential areas of functioning for all checked and featured platforms, this being how we review casinos in general. In the case of slots sites, we prioritise aspects specific to the game type:
The number of slots on the site.
The game providers behind the titles.
RTP rates and volatility.
Reels, paylines, and in-game bonus features.
Transparency in communicating game specs.
Interface quality and fidelity.
Bonuses dedicated to slots.
Game variety and presence of jackpots.
Promotional policies for slots.
We use our expanding database of 240+ casinos to create a dynamic and trustable standard that reflects the state of the UK market.
CasinoAlpha found the following qualities to be necessary for slots sites:
Ideal for British Slot Sites:
Number of slots: 1000+
Provideris: 5 or more renowned providers
RTP rates: Aboveabove 96%, 99% included
Reels, paylines, features: More variation
Game spec communication: Specs immediately stated
Interface and performance: Well-performing and pleasing
Wagering contribution: 100% for all non-progressive slots
Jackpot availability: Jackpots and progressive jackpots available
Beyond the reviews that communicate all relevant aspects succinctly, according to our editorial policy, we generate ranked lists for slots sites that perform exceptionally well in one area:
Sites that include a specific popular title
Casinos that host a provider’s catalogue
Newly launched UK slots sites
Platforms with particular bonuses, like free spins
And more.
How we test & rate?
Read more
Every UK slot site you see here has been tested with two main focuses.
Full review
Our reviews have multiple parts and thousands of words each. This length and level of detail are because we want to check all the essential aspects.
We look at the licencing to have a base layer of safety, security, and player fairness.
We count the games and the game providers to see how much variety you have as a member. Then we see how they are grouped, detailed, and how easy it is to navigate the lobby.
We use the bonuses and finish playing them. As such, we can assess if the terms conform to the player experience and how likely you are to cash out.
Each review implies that we use at least 4 different payment services when permitted by the casino, 2 to deposit and 2 to withdraw. Thus, we can tell you what we recommend to protect your payroll.
Slot features
We know the games entirely, including what features mean and how they affect your play. We test every game like this:
Volatility – How likely the pot results may change dramatically
Paylines – How many winning combinations the game embed
Bet limits – Can your budget fit the average gameplay?
User experience – Are there any glitches that can annoy you?
Upon registration, players will get 30 extra spins on Secrets of the Phoenix Megaways after making a first deposit of at least £10 and wagering that sum once.
How can you claim your spins?
Visit the casino’s website.
Complete the registration process and verify your account.
Make a minimum deposit of £10.
Wager the deposited sum.
Bonus Rules
The spins generated value have no rollover requirements.
This promotion is available for 30 days.
The value of each spin is 20p.
To make the most of this offer, read the casino’s terms and conditions carefully.
New members only, must opt in. Min £10 deposit & wager. 30 day expiry from deposit. Free Spins: on Secrets of the Phoenix Megaways. Spins value: 20p each. Play Responsibly. BeGambleAware.org. 18+. †£10 lifetime T&C Apply, 18+
After registering a new account, opt-in for this offer and deposit £10. The funds must be wagered on Monopoly Paradise Mansion slot game to receive 30 no-wagering spins.
How to claim the offer?
Head to the casino’s official page.
Sign in to the newly created account.
Deposit at least £10.
Wager the funds on the eligible game.
Rules on the offer
The bonus has a 30 days expiry time.
Spins must be used on Monopoly Paradise Mansion slot game.
There are no wagering requirements for the spins.
To make the most of this offer, read the casino’s terms and conditions carefully.
New members only, must opt in. Min £10 deposit & wager. 30 day expiry from deposit.18+. Free Spins: on MONOPOLY Paradise Mansion. 1p coin size, max lines. Bingo: Advertised ticket value based on £1 tickets. Game availability & restrictions apply. T&C Apply, 18+
Create a new account, deposit and stake £20 and get 50 free spins on Starburst.
How to claim the offer
Head to the Planet Sport Bet Casino.
Create an account.
Deposit more than £20.
Bonus rules
Winnings from spins must be wagered 10x times.
Minimum deposit is £20.
The only eligible game is Starburst.
Spins expire 7 days after activation.
We suggest checking the full terms and conditions for further information about this offer.
New customers only. Min Deposit £20. Wager £20 minimum on slots and get 50 free spins on Starburst. Free spins will expire 7 days after issue. x10 wagering on Free spins. BeGambleAware.org. Bet The Responsible Way. T&C Apply, 18+
Create a new account and deposit at least £10 to get the spins on the Rainbow Riches slot game.
How to claim the offer
Head to the Rainbow Riches Casino.
Fill in the registration form.
Claim the offer.
That’s it.
Rules on the offer
Newly registered players must opt-in and deposit over £10 to benefit from the offer. Players will get 30 spins, where each spin is worth £0.1, to use on the Rainbow Riches slot game. There is no wagering requirement for the rounds.
New members only, must opt in. Min £10 deposit & wager. 30 day expiry from deposit.18+. Free Spins: on Rainbow Riches. 1p coin size, max lines. Bingo: Advertised ticket value based on £1 tickets. Game availability & restrictions apply. **£10 lifetime deposit for Daily Free Game. T&C Apply, 18+
200 Bonus Spins with 10 points per spin on Fishin’ Frenzy The Big Catch Jackpot King.
Important details:
When you are using bonus rounds, you cannot obtain any jackpot.
By staking an extra £10 on Bingo, you will be offered extra rounds.
Any profits will be paid out as real money.
The first deposit bonus does not combine with any other offer.
How to get the bonus:
1st step: Press the visit button from our page.
2nd step: Create an account with GBP (£) as currency.
3rd step: Place the required amount into your principal balance.
4th step: Stake at least £10 on Fishin’ Frenzy The Big Catch Jackpot King.
If you want to obtain this offer, you know what to do!
The Legal Stuff: New players. Deposit, stake £10 Bingo get £30 bonus (x4 WR) & £10 Club voucher, or dep, stake £10 slots get 200 x 10p Fishin’ Frenzy™ The Big Catch Jackpot King™ spins (x20 WR) & £5 Club slots voucher. OR use cash balance/further deposit & get both. £5 min. withdrawal. T&C Apply, 18+
If you are a new Betfred player who’s planning to deposit for the first time, you may redeem a promotion that consists of 100 rotations on Starburst.
What can you do to claim it?
First, you must create a new account at Betfred. Enter the GAMES100 bonus code when you register, then move on to verifying your account. Deposit £10 and stake your cash balance to receive the promotion.
The conditions to abide by:
You will get the extra rounds within 48 hours of your fulfilling the conditions. Then, you may use them for 7 days. You are not eligible for the bonus if you deposit with an e-wallet.
Finally, remember to check the casino’s Terms and Conditions for full promotional coverage.
New customers only. Register with code GAMES100. Deposit and stake £10 or more, within 7 days, on Slots at Betfred Games to receive 100 Free Spins on selected titles. Free Spins credited within 48 hours. Free Spins are valid for 7 days. E-Wallet & Card restrictions apply. SMS validation may be required T&C Apply, 18+
After registering, deposit and wager at least £10, and you will receive 30 extra spins on Double Bubble.
How can you claim your spins?
Click our blue ‘Play’ button and opt-in for the offer.
Complete the registration process and verify your account.
Select the ‘Submit’ button.
Make a minimum deposit of over £10.
You will receive the spins after playing the deposited sum.
Bonus Rules
To cash out, you must wager your deposit 1x on any game.
The promotion is available for 30 days.
The value of each spin is 1p.
You have to wager one time the spins generated value before you can request a cashout.
To make the most of this offer, read the casino’s terms and conditions carefully.
New members only, must opt in. Min £10 deposit & wager. 30 day expiry from deposit. 18+. Free Spins: on Double Bubble. 1p coin size, max lines. Bingo: Advertised ticket value based on £1 tickets. Game availability & restrictions apply. ‡ Current Jackpots are across selected games. T&C Apply, 18+
The platform is operated by LeoVegas Gaming PLC and licensed by the UKGC and MGA. Gamblers can download the mobile app from either App Store or Google Play.
Pros: PayPal payments, fast withdrawal time, over 100 live dealer games.
Cons: no phone number available
The offer:
After registering at the casino, deposit over £10 to be eligible for the first deposit bonus and unlock the complete welcome package:
1s deposit: up to £50 bonus + 5 no wagering spins on Big Bass Splash.
2nd deposit: up to £50 bonus + 5 no wagering spins on Big Bass Splash.
Be aware:
The bonus value depends on your deposit amount. For example, you must deposit between £25 to £49 to receive a £25 bonus. Before receiving the bonus money, you must wager the deposit 35 times. The site provides an impressive game library with more than 1300 slots. Gamblers can choose from various game types, including classic slots, live dealer games, and tables. The live chat feature is operational 24/7. Unless stated by an active promotion, you cannot withdraw less than £10.
New players only across two deposits. Rewards have 7 days from registration to opt-in from “My Promotions” page & each with 7 days wagering. Deposit £10, £25 or £50 & wager 35x. Only cash stakes qualify & wagering contributions vary. 5 free spins worth £0.10 to be claimed within Big Bass Splash with each qualifying deposit, 3 day expiry. T&C Apply, 18+
Upon registration and making the first deposit of at least £10, you will get 50 no-wagering spins with a £150 match-up bonus.
How to claim:
Click on the ‘Play’ button and go to the official website.
Fill in the registration form with your details.
Make your first deposit of at least £10 to activate the bonus.
Claim the promotion within seven days of registration.
After completing the deposit money rollover, you will receive the bonus and 50 no-wager spins.
Important Rules:
You have to wager the bonus amount 35x times and cash out up to the maximum of £150.
The spins expire in 3 days and come with no wagering requirement.
They must be used on the Big Bass Splash slot game.
All the funds generated from the spins are rewarded as real money.
Each spin has a total value of £0.1.
Before claiming the promotion, make sure you read the Terms & Conditions of the bonus.
New player only. 7 days to claim offer and deposit a min of £10 with a further 7 days to wager 35x. Cash stakes only and wagering contributions vary. Max reward £150. 50 wager-free spins 0.10p each on Big Bass Splash awarded after wagering complete, winnings paid as cash. 3 day expiry. T&C Apply, 18+
As soon as you join VoodooDreams, you may redeem a 100% up to £50 incentive and 50 extra rounds on Book of Dead. This offer is linked only to your first deposit on the site.
What you must do to claim it:
Hit our promotional button;
Complete the registration form;
Deposit an amount exceeding £20.
Remember these rules:
The spins have no wagering requirements;
The play-through condition for the bonus funds is 30x deposit+bonus;
Games contribute differently towards meeting the requirements;
The maximum bet you can place with the bonus is £2;
The maximum cashout for the bonus funds is £500.
Feel free to check VoodooDreams’ terms and conditions for further details concerning this offer, and don’t forget to play responsibly!
New players only. Maximum £50 bonus. Minimum deposit: £20. Bonus wins are capped at £500. Max bet with active bonus: £2. Wagering requirement 100% match deposit bonus: 30 times sum of deposit + bonus. Winnings from Free Spins are credited as Real Money without wagering requirements. Some games may not be played with an active bonus. Games may contribute differently when wagering a bonus. Bonus expires after 30 days if wagering requirement has not been met. One bonus allowed per person, address, device, IP T&C Apply, 18+
Make your first deposit of £20 and, you can get a £50 bonus.
Remember that:
You’ll receive £20 that can be used on any casino game and £10 that can be used only on slots and live casino games. To receive the latter offer, you must claim the chosen bonus on the promotions page. The £20 bonus comes with a 5x rollover request, while the other bonus comes with a 10x wagering request.
How to activate the bonus:
Click on the promotional button;
Create an account;
Fund your account with over £20.
Check out the bonus policy before you claim the promotion!
New customers only. min deposit £20. max non-withdrawable bonus £30. playable on selected games only. 30x wagering required. expires within 30 days. max win £2,000 T&C Apply, 18+
The casino is developed by Jumpman Gaming Limited and it has been launched recently in 2021.
Pros: several games from top-brand producers, loyalty program available, swift payouts
Cons: no mobile or desktop app available as of now, only an email option for contact
The offer:
5 spins on sign-up for Immortal Romance
You receive a try to the Loot Chest to claim up to 500 extra spins on Immortal Romance and the chance to win some prizes like Amazon vouchers.
Remember:
The ‘Loot Chest’ will only be credited on your first deposit on the site
Only bonus wagers will contribute towards fulfilling the wagering requirements
500+ Slots are up to play
£8 per 10 spins is the highest sum you can acquire from spins
No deposit offer T&C’s: new players only, no deposit required, valid debit card verification required, £8 max win per 10 spins, max bonus conversion £50, 65x wagering requirement. First deposit offer T&C’s: 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, 18+
Players that sign up for a new account at mr.play receive 100 bonus spins on Starburst on their first deposit greater than £10.
Steps to get it rolling:
Register on the site.
Deposit the required amount.
Receive the spins and use them before they expire.
The catch:
Deposit only through debit cards; deposits via e-wallets will not count for this deal.
Spins have a 5 days validity period.
Winnings generated through the bonus rounds must be wagered 35x.
Wagering example: suppose you generate winnings amounting to £50, then you must wager 35x £50 = £1250 to cash out;
The amount that you may transfer to your real balance after you meet the wagering condition will not be greater than £100.
Visit the casino and read the Terms attentively before you start exploring the games.
UK residents only.Deposits made via e-wallets are not valid for this promo.Min deposit £10.Spins are valid only on Starburst and expire in 5 days. 35x wagering applies.Winnings from bonuses are capped at £100 T&C Apply, 18+
After completing the registration process and making your first deposit of over £20, you will get 150 no-wagering spins to use at the casino.
How to claim the offer
Go to the casino’s website.
Complete the registration process.
When making your first deposit of at least £20, use the “150RS” promo code to activate your bonus.
You will receive a link for claiming the spins via email.
What you should remember
To make your first deposit, you must verify your account.
Excepting a jackpot win, the maximum generated value from the spins is capped at £20.
You must claim your bonus within 48 hours of receiving the email.
Unused bonus spins will no longer be available after 14 days
Please visit the casino’s website to meet and understand the terms and conditions of their bonus policy.
First-deposit only • Claim in 48 hrs • RS (Real Spins) expire in 14 days • Valid for selected games • Wins credited as real money & capped at £20 • Winnings granted once all RS used or once winnings cap reached • Withdrawal restrictions T&C Apply, 18+
PokerStars Casino has more than 1000 slots and 55 live dealer games. It has a six-tier VIP club and games from Microgaming, NetEnt and Pragmatic.
Pros: 1 day payout time, Apple and Google Pay available, KYC lasts only 24 hours
Cons: only live chat available
The bonus
100 free spins when you register
100% up to £200 for a deposit of £20 with code FIRST20
Be aware
The registration spins will be credited in batches and work only on selected games. The deposit offer is available only if you deposit with Visa and Mastercard. Besides these credit cards, you can deposit using Google and Apple Pay, PayPal and e-wallets. The minimum deposit and withdrawal are set at £10, while for the maximum cashout there are no limits.
New casino players only. Min. deposit £20 with code ‘FIRST200’. Debit card (Visa or Mastercard) only. Selected Slots only, 7 day expiry. Wagering requirements apply, 5 redemption points per £1 to clear bonus. Game contributions vary. Maximum bet £5 per round. T&C Apply, 18+
This is an InTouch Games brand offering only in-house products. The casino is licensed by the UKGC, and it also works great on mobile devices.
Pros: Pay by Phone deposits, fast payout processing.
Cons: processing fees for withdrawals under £10.
The incentive:
Upon joining the site, you might get a £10 no deposit bonus and a welcome package consisting of the following:
1st deposit: 200% up to £200 + 50 free spins on Treasure Tomb
2nd deposit: 300% up to £100 + 50 free spins on Lion Fortune
Be aware:
The offer comes with a 40x wagering requirement for bonus and spins’ winnings. Bonus funds related to the deposit offer expire within 30 days of being granted and spins within 24 hours. At Jammy Monkey, you can play over 30 in-house slots. All of these also include jackpots that can reach up to £100000. Yet, keep in mind that no table games or live casino products are available. Customer support is available 24/7, but it may take quite long to get in touch with an operator via live chat. Last but not least, you may deposit amounts as low as £5.
New, ID Verified players only. Up to £10 bonus credit. 40x wagering requirement. 7 day expiry. £50 max withdrawal from bonuses without a deposit across all Intouch Games Accounts; mFortune, Mr Spin, Dr Slot, PocketWin, Casino2020, Cashmo, Bonus Boss, Jammy Monkey. 1st deposit: up to 50 (15p) free spins (FS) in Treasure Tomb and an up to 200% deposit match. 2nd deposit: up to 50 (15p) FS in Lion Fortune and an up to 300% deposit match. Max 10 FS issued per day. Max combined bonus credit of £300. Min Deposit £10. 40x wagering requirement. Bonus 1 expires 30 days after registration. Bonus 2 expires 30 days after 1st deposit. 24hr FS Expiry. BeGambleAware.org T&C Apply, 18+
Signing up with PeachyGames means you may claim a 100% up to £50 match promotion. Along with it will come 20 bonus rounds to use on Book of Dead.
The redemption process:
Join PeachyGames from our website;
Create a new account and verify it;
Deposit £10;
Claim your bonus.
What to know before you go:
Both the promotional funds and spins come with 40x wagering requirements. The match offer will expire in 30 days, while the extra turns are available for 2 days since you activated them. What’s more, you cannot withdraw over £250 from wagering your bonus balance.
Extra details are available on the casino’s Terms and Conditions page.
New players only. 100% bonus on first deposit up to £50 & 20 Bonus Spins. Bonus spins are credited immediately and are valid for Book of Dead slot only. Min first deposit of £10. Max bonus £50. Max bonus bet £5. Max bonus cash-out £250. 40x wagering requirements. Bonus expiry 30 days. Bonus spins expiry 2 days. Game restrictions apply accepted countries: UK only T&C Apply, 18+
All British Casino belongs to L & L Europe Limited, which has years of experience on the market. All its games are tested for fairness by eCOGRA.
Pros: You can contact live chat even as a non-member; over 1100 slots from suppliers like Play’n Go, NetEnt, Microgaming, or Pragmatic Play.
Cons: The platform loads slowly and may crash, even on mobile.
Enter the promotional scheme to get:
Five extra rotations on registration, no deposit required. If you then deposit, you are up for a 100% match offer up to £100, and 10% cashback on all subsequent deposits – as long as you do not use them to claim bonuses.
Know this before you set off:
The cashback will enter your real balance directly, without wagering requirements. Your funds and turns will require 35x wagering. The casino imposes KYC procedures from registration, you cannot engage in gameplay otherwise. Payout requests will take one day to process. You cannot withdraw more than £5000 per day and £110000 per month from regular casino play.
Welcome bonus for new players only. Maximum bonus is 100% up to £100. No max cash out. Wagering is 35x bonus. Cashback is cash with no restriction. Cashback applies to deposit where no bonus is included. Maximum bet while playing with a bonus is £5. Max cashout is £100 if never deposited, no max once deposited. Bonus excluded for players depositing with Skrill or Neteller. T&C Apply, 18+
Transparency is a key part of our review process. To stay true to ourselves, we present in detail how we work for UK players.
The UKGC mainly focuses on:
Providing responsible tools
Pre-empting minor gambling
Offering an overall reliable experience
General prerequisites for safe play at a casino.
Step 1: It all starts with a valid licence
The United Kingdom Gambling Commission guarantees the UK slot sites follow strict legislation. The terms are fair, the games are not pressuring you to play too fast, you have access to responsible tools, and your overall time spent there is positive.
Tips
The United Kingdom Gambling Commission always prevents minors from gambling. Thus, your children will be protected too.
Step 2. We check slot sites’ RNG
Most top online casinos with a UKGC licence also have their RNG systems vetted by independent third-party auditors.
We will look for online slots sites with RNG fairness seals from:
eCOGRA
Gaming Labs
iTechLabs
Those add a layer of safety regarding the software and engineering of the games we have no way of testing ourselves.
Step 3. We dig deeper into the volatility of slots
Slot game volatility means the likelihood of the result of a spin to be widely different each time.
There are two volatility phases:
Low volatility – the game payout is the same range almost all the time, and the sums are never too high as compared to your bet
High volatility – the game payout may be significantly higher than the bet, even if the bet was quite insignificant
We can check that by going in the game’s settings. In the rare cases when that is not public in the open game, we test it for two weeks and make our own assessment.
Step 4. We never miss looking at the paylines
Paylines are the embedded winning combinations that, when hit, will result in a winning bet.
The number of paylines must always be written in the game settings. Sometimes, the original number may be expanded in certain conditions, which fall in the special features category.
Step 5. We analyse the unique features of the UK slot sites
Since there are thousands of games featuring different types of slot machines created yearly, the best ones need to have catchy features. We analyse them and tell you which feature is the best.
Here are the main ones:
Multipliers – the number of times your bet result will be multiplied randomly
Wilds – random symbols that appear and expand your bet
Scatters – random symbols that create a payline where it wasn’t
Step 6. We proceed with making bets
We test all of the settings and details with real funds. That is the same method you would use when playing, and we need to make the same steps you do so we can be your trusted guide.
Step 7. Overall user experience on mobile & other devices
Between 80% and 90% of online gambling is nowadays done on mobile phones and sometimes mobile tablets.
Thus, we focus on those types of devices a lot when we test the best online slot sites. We can then see if there are glitches and how they might affect your sessions.
Why do we use all these testing methods?
We want to bring you the best gambling services that we confirm to be good first. We need hand-down testing, methods that are available to you and bring you the safest options.
Important
We use objective testing and a team system to remove bias on any opinions we might have.
As you can see, we only select casinos that are well-renowned casino operators in the UK. From their overall features, we selected game variety of hundreds of games or more because we know how important variety is. This is why added casinos that have multiple providers involved.
What makes Monopoly Casino the best UK slots site?
You will find +50 jackpots and 4 progressive jackpots on this website;
The min. and max. slots bet limits are £0.01 to £100;
Overall, a variety of 1300 slots exceeds the UK average of 500.
We chose Monopoly Casino because of its well rounded experience that it gives to the user. You will be able to find anything on this website, whether you are a low or a high-roller, there are all the slot types available on this platform, a large number of slots, and popular providers such as NetEnt, Microgaming and others, which prove a competitive level of diversity of this platform.
Virgin Games is a strong contender
Play top slots from +45 trusted providers including UK-favourites like NetEnt, Pragmatic Play and others.
Almost all slot types are available, including jackpots and progressive jackpots;
You can play demo mode on certain titles.
We feel like Virgin Games Casino is a strong candidate for the first place: rich in game diversity and the providers list is massive as well. The fact that it offers almost all online slot game types is impressive. Unfortunately, the platform only has 450 slots, which is too low to rank it first.
Megaways Casino comes third in our top
You can play bonus buy, 3-reel classic slots and others;
This is the best site for Megaways slots as it features the full diversity of games;
Slots are powered by NetEnt, Microgaming and 4 other popular UK providers.
Our experts decided that Monopoly Casino is the third slot site for UK because its features are fit for the UK player. However, while the providers are undoubtedly established names, there are only 6 of them. This brings us to the reason why it could not be the first-ranked best slot site in the UK, the overall number of slots, which is under 500.
We start from a baseline of high standards for new casinos in 2023, to be sure they reach our safety and playing standards. The rest is quite similar to any casino review we create. We look at game variety, considering the total number of online slots and the specific slot subcategories.
Why Barz is our best UK new slot site in 2023?
This site exceeds the UK average number of slots with +1200;
You will find multiple game types such as classic slots, jackpots and more;
You can apply filters such as by provider, game type or others, when searching for slots
For a website that was released in 2021 to have so many features optimized for the British punter, it is a rare occasion. This is why our team of experts chose Barz Casino for our best new UK slot site for 2023.
Alternatives
Explore our reviews of WatchMySpin and SpinRio if you feel Barz doesn’t live up to your expectations. While all our picks are thoroughly tested, you are free to explore all of the UK’s top new 2023 slot sites.
How to Pick a UK Slot Site & Sign Up?
Use CasinoAlpha’s database which is updated monthly.
Find a site with ratings above 3.5 stars out of 5 total.
Read our review and bonus descriptions to get familiar with what they offer.
Sign up using their instructions.
Complete KYC as fast as possible so you waste less time while engaged in transactions.
Play safely and respect the Terms and Conditions attached!
Bonuses Compatible with Slots
Bonus type
Best feature
Tips
Find it here
Free rounds
Budget-friendly
Calculate the bonus value by multiplying the spin value by the number of spins received
These are just a few subtypes of the best online casino bonuses that we work with daily. We know that each player can find a type that fits their needs, whether it is about slots with free spins, or live casino promotions.
Be aware
Each slots bonus has unique terms and conditions attached. You need to stick to it and respect it, otherwise, you risk losing the bonus or the funds derived from it.
Cashing out before finishing wagering, when the issue is present, is impossible and may result in you losing your bonus.
Recommendation
Take time between sessions and bonuses for your own mental health. Gambling excessively can turn you into a bonus hunter and have negative consequences.
Most Popular UK Slots
UK slots
Bet range
Volatility
Best feature
Starburst
£0.10 – £100
Low
Both ways win
Book of Dead
£0.10 – £100
Low
Expanding symbol brings free spins
Immortal Romance
£0.30 – £30
High
234 paylines
Why are these the most popular?
We’ve primarily taken into account player needs through extracting data of searches on our site. We know these are always trending. Then, we look at the bet ranges and look at the way they can suitably fit any budget for any UK player.
Starburst – an online casino slot best for beginners
The graphics are very attractive and are layered by a 5×3 grid
It is created by a well-known provider and has had solid popularity since its release in 2012
There are not too many symbols to confuse a beginner, just Wilds.
Recommendation
For a more personalised session on this game alone, CasinoAlpha’s authors have created a listing of Starburst free spins promotions.
Book of Dead – one of the top slots online
It has an Ancient Egypt thematic which is widely attractive to gambling users from the UK
The bet limits are quite accepting of both casual and high-rolling sessions
It has a classic payline number, totalling to 10.
It contains multiple special features, like Wilds, Scatters, Multipliers, Free Spins, and the Gamble Feature.
Immortal Romance – high volatility best online slot pick
The most eye-catching feature it has is the high number of possible paylines.
The most one can win is 12000 times the original bet.
Some special features are unlocked during the game, so there are layers to a play.
Each symbol, or a game character, may influence the end of a round.
Top jackpot slots online
Slot
Provider
Highest paid result
Best feature
Mega Moolah
Microgaming
£11 million
Progressive & Multiplier features
Mega Fortune
NetEnt
£2.19 million
Bonus rounds
Cleopatra
IGT
£8200
Possible 10000x bet result
Best jackpots choices by us
Our choices at this point are quite intuitive. We have chosen the jackpot slot games that have accumulated the highest jackpots over the years.
Advice for safe jackpot play
The probability of winning the jackpot is tiny, so keep your hopes low.
As someone who has just learnt how to play slots online, or as a player who wagers on a strict budget, we advise you to limit your sessions to under 15 minutes a day.
There is a small percentage of casino bonuses based on them.
Game providers shine the most when they are partnered with high-quality casinos. For example, some of the best casinos we have listed are top Microgaming slots online casinos or NetEnt casinos in the UK. They are SSL-locked, UKGC-licences, and independently reviewed sites with thousands of new users signing up daily.
While these are business-to-business collaborations of two separate entities, the best IGT slots sites offer, besides their gaming palette, whitelabel solutions to online casino sites. Thus, all of the items in the category share certain similarities.
How to Play Slots Online?
Basic steps to slots play
Your first and most vital step is to know the game rules and what each symbol or feature does. That means you won’t have any surprises with the game’s functioning.
The second step is to make calculations to reach a fixed slot play budget. Once there, never exceed it.
Important
CasinoAlpha’s perfect budget formula is to first figure out your pocket money monthly, after bills, and your savings accounts. Out of that sum, 10% can be used for gambling. We highly recommend you don’t spend more than that.
The third is to choose a casino and a game. That’s where we help you with your decisions.
The fourth step is to read the game specifications and rules once you launch it. Then, you can just play.
How do online slots work?
They are software that is built on complex code. Their results are based on Random Numbered Generators, so there’s no room for rigged results.
How do online slots pay real money?
All of the games on UK online casinos can pay out real money if you use real funds and hit a payline.
Tips
Real funds play in the UK is tied to confirming your account and finishing KYC to prove you are of legal age and your payment services are legitimately yours.
Glossary of slot game types
Slot machine type
Distinctive features
Real slot machines
These are the games found in top land-based casinos from the UK. They are activated manually through a button or an arm. Obviously, you can’t find them in online casinos, but they are the base source of the game we play today.
Classic slots
These are games that have a classic layout, usually with 3 rows and 5 reels. The paylines are between 10 and 25 at most, and the animations are minimalistic. They are meant to mimic the original games that were built almost a century ago.
Fruity slots
The symbols that fall and rearrange themselves are fruits, like cherries, watermelons, etc. Otherwise, the design is very much similar to classic slots. You will find symbols that represent the number 7, which is a stable symbol.
Video slots
The animation, fades, music, and all the sensory elements are very modern and high-tech. There is no single theme associated, but the most encountered are adventure-based, historical, mythological, and fantasy designs.
Progressive
The pot that increases or decreases while you are playing can grow in size and value when you keep playing. In certain instances, the pot increases while players are betting on multiple platforms, like Mega Moolah, for instance. Jackpot slots are a synonym for the same concept.
Megaways
These are slots in which the winning paylines reach numbers that go way over 10000. This is a creation of Big Time Gaming and they have, naturally, gained a lot of traction in the UK online industry.
Jackpot slots
Jackpot slots are the ones where the pot increases continually and exponentially to the bets made by one or more players that are actively playing. The terms jackpot slots and progressive slots mean similar things and can be used interchangeably.
VR slots
These are slot games designed to be played with the use of a Virtual Reality headset and additional gear. You can find them in VR casinos or in places dedicated to that medium. The game rules and layouts are not changed dramatically.
In-house slots
In-house slots are games developed by certain providers, especially for one specific casino. The site has trademarks over them and UK gamblers can only play them on those specific sites. We let you know which casinos have such exclusivities through each of our reviews.
Our recommended strategy for online casino slots
Nothing is more important than managing your casino bankroll wisely. There’s no complex strategy for the game itself, and therefore, the way to manage your funds is your pinnacle point.
After setting a budget you need to:
Know the game well enough.
Don’t bet high sums in general.
Examine the paytable and know what symbols you’re playing with.
Take breaks often.
When, if ever, should you bet the maximum amount?
You can try to do that once every few months. It is not sustainable to do it constantly and often.
Betting the maximum sum allowed may get you closer to activating the jackpot special feature of certain sums. That, in turn, may give you free rounds, which essentially are you playing more with no spending.
But the probabilities are low for that to happen and are disproportionate to the investments. So, don’t do it more than a few times a year.
Payment information & advice
Here is CasinoAlpha’s guidance on slot site payments:
Don’t make high payments to casinos you’re new to; play slots with a minimum deposit and keep it affordable.
Use payment methods that you are comfortable with. Look up e-wallet choices like Neteller casinos to shorten withdrawal times.
Don’t pick options that apply fees that obviously affect your bankroll.
Finish wagering before cashing out.
Make sure you don’t have any pending transactions before engaging in another one.
Why Play on UK Slot Sites?
They are popular and there are hundreds of them on the market.
The way they develop, perform, and evolve is fast-paced and user-experience oriented.
Most of them have bonuses, some of which are free of charge or free of wagering requirements.
The deposits and bets you need to make can be small and protect your funds.
The slot games have an easy playthrough and don’t require complex strategies or calculations.
All of the casinos listed by us are licenced by the UKGC and reviewed by a competent team of casino analysts. Some of them also have authentications from third-party gaming testing agencies.
They are a good option to start with for new gamblers.
All of them have responsible gambling tools that limit your play or spending the way you set them up to.
Pros and Cons
Pros
Easy to access and use on all platforms, mobile included
Present a wide range of products from well-known gaming software producers
Have multiple bonuses available at all times
Usually allow many deposit and withdrawal methods
Have embedded responsible gambling tools that are quite efficient
Cons
Some may have no other game options besides slots
The terms may be hard to decode
No other perks besides the basic whitelabel products
Methodology for Online Slot Sites UK
It took us more than 50 hours to create this page. That is, over the 10 hours we dedicate to each individual review. Our database was our starting point and your usual gambler steps were our road map.
Tips
We will make all the necessary modifications to this page if new information is revealed by the legislation or the big competitors in the industry.
Phases of research and analysis
Taking a casino and our review and doing a double-check on its facts, authenticity proof and reliability.
Retaking the steps of a gambler that is looking to play online slots.
Playing and paying like an average UK player.
Comparing hundreds of casinos to the industry average to arrive at a temporary list.
Comparing the casinos to each other to get the tops you see here.
Discussing with other teammates to remove bias or the natural doses of subjectivity.
F.A.Q
Is each reel on an online slot machine random?
Yes, as long as the game is hosted by a licensed casino and a casino with extra certifications of software standards.
Are online slot casinos legit?
Yes, they are, as long as they are licensed by the UKGC. We also verify their legitimacy.
Can I win real money while playing slots?
Yes, you can, as long as you play a bonus or use real money, and you hit a winning payline. Extra limitations are imposed and you can find them in the terms and conditions.
Which slot sites offer a free sign-up bonus?
Casinos that offer free spins or no deposit bonuses are the sites you’re looking for. We have dedicated pages for both.
How to win at online slots?
Budget well, limit your spending, and avoid the progressive slots and maximum bets.
What online slots pay real money?
All of the games on UK online casinos can pay real money when you hit a payline. You have to be engaged in bonus play or real money bets for that to occur.
What are the best online slots to play?
Book of Dead, Starburst and Immortal Romance are great choices to start with. Others include Fluffy Favourites, Book of Ra, Gonzo’s Quest, Thunderkick or the Age of Gods series.
Which online slots payout the most?
Jackpots pay out the most money, but the frequency of payout is very low. Mega Moolah is the most prominent game in that category.
How to win big on online slots?
There is no real recipe for success. Slots are not games that are notorious for big wins. Your best method is to pick a game that you learn well and be wise when you calculate your budget.
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.
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