The Greatest Slot Sites for Players in the UK in 2021

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If you’re a gambling enthusiast, we’re happy to announce that it’s the perfect time to check out all the finest slot sites to be found in the UK. We did the research and have plenty to tell you, so read our expert reviews to choose the best slots venue with confidence.

Operator
Rating & Review
Key Features
Welcome Bonus
Get Started
1.
1.
karamba casino logo
5 / 5 Read Review

Casino & sports betting in one place

Distinctive branded design

Incredible weekly promotions

New depositing players only. Min. deposit: 10€. Max. bonus: 200€. spins are given as follows: 20 spins on Fruity Friends and 100% bonus upon first deposit. Another 40 spins on fruity friends are given upon deposit on the second day after the first deposit (min 20€), and an additional 40 spins are given upon deposit on the third day (min 20€). All Terms apply.

2.
2.
grand ivy casino logo
4 / 5 Read Review

Three-part welcome bonus

£30,000 cash prize giveaway

Scratch games

18+. One bonus offer per player. Minimum deposit £20. Max bonus bet is £5. Bonus spins on selected games only and must be used within 72 hours. Winnings credited as bonus funds and capped at £100. Bonus funds must be used within 30 days. Bonus funds are 100% match up to £300 with 25 spins on Starburst on your 1st deposit, 25% match up to £800 with 50 spins on Aloha Cluster Pays on your 2nd deposit, and 50% match up to £400 with 25 spins on Gonzo’s Quest on your 3rd deposit. 35x wagering. www.gamblingtherapy.org. Full terms apply.

3.
3.
pokerstars casino logo
5 / 5 Read Review

1,600+ games

Casino dedicated to poker

Exclusive game titles

New casino players only. Min. deposit $10 with code ‘CASINO100’ via selected payment methods. Free spins on selected games only expire in 7 days. Terms apply.

4.
4.
william hill casino logo
5 / 5 Read Review

Massive selection of jackpot games

Daily cash prizes

Branded slots

Opt in required. New customers to Casino page only. 1x per customer. Min. Buy in £10. Bonus value 100% of Buy in. Max. Bonus £300. 40x Wagering, Max Redeemable £4,000. 50 Free Spins with x35 wagering will be awarded after the Buy in Bonus is completed, Max Redeemable £1,000. Bonus expires after 7 days. Stake contributions, player, country, currency, game restrictions and terms apply.

5.
5.
buzz bingo logo
5 / 5 Read Review

The Voice partner

Buzz Originals slots collection

Daily slots tournaments

Customer must deposit and spend £10 on bingo tickets to get £30 online bingo bonus. Bingo Millions not included in offer. Payment restrictions and terms and conditions apply. T&Cs apply. 18+BeGambleAware.org

6.
6.
casimba logo
5 / 5 Read Review

Sleek interface

Great welcome offer

Versatile sorting and search options

18+. New Players Only. 1 bonus offer per player. Min. deposit £20. Max. bonus bet is £5. Bonus spins on selected games only and must be used within 72 hours. Winnings credited as bonus funds and capped at £100. Bonus funds expire in 30 days, unused bonus funds will be removed. Welcome Offer is 100% match up to £500 + 50 bonus spins on your 1st deposit, 25% match up to £1000 + 50 bonus spins on your 2nd deposit, and 50% match up to £500 + 25 bonus spins on your 3rd deposit. 35x wagering. Only bonus funds count towards wagering contribution. Terms apply. BeGambleAware.org.

 

7.
7.
grosvenor casinos logo
4 / 5 Read Review

New exclusive slots section

Holiday promotions

Live chat support

New players only. By claiming this offer, you will no longer be eligible for any other welcome offer. Minimum deposit is £20. 5x wager requirements. Full Terms apply.

8.
8.
888 casino logo
5 / 5 Read Review

No-deposit new-player bonus

Established franchise

Unique site design

You may not combine this Offer with any other type of welcome offer or first-time deposit offer on the Site. Minimum deposit $20. Deposits made with Skrill or NETELLER are not eligible. 30x wagering. Full Terms apply.

9.
9.
rizk casino logo
5 / 5 Read Review

Rizk Insider section

Wheel of Rizk game

Rich live casino section

New players only. Minimum £10. Wagering requirement 40x. Full Terms apply.

10.
10.
all british casino logo
5 / 5 Read Review

UK-centric design

Games from the best developers

Extensive video slot collection

New players only. Min. deposit £20. Wagering 35x. Max bet with bonus funds £5. 200 Free Spins on Hot Fruits. Skrill and Neteller not eligible. Full Terms apply.

Methodology

Our Methodology and Review Process

User Experience

User experience, as the name suggests, refers to the overall impression a website leaves. Both the technical and the visual aspects of a platform factor into it.

As you may know, a visually appealing website will have better chances of enticing customers, but without great functionality, the total experience won’t be as positive. That’s why it’s vital to determine how easy it is for users to interact with a given website, in addition to how good it looks.

All the top slot sites should offer enough customisation options, cross-platform support, quick loading times, and superb graphic quality – plus a few additional perks – to impress us.

Welcome Bonus

Welcome bonuses are the bread and butter of prospective casino customers. These promotions usually give newly registered users bonus funds, free spins, or casino-specific rewards when they make their first deposit. Such offers almost always come with wagering requirements to encourage you to try your luck on the website’s games.

We evaluate welcome packages to determine just how valuable to users they really are. Thankfully, because websites have to stay competitive, the rewards they offer are worth signing up for. You’ll often see new slot sites with a free sign-up bonus that’s meant to help them grow their user base. We heartily recommend taking advantage of them.

However, it’s important to remember that these gifts come with caveats: Your free spins or casino dollars might only be eligible for specific games or need to be used up by a certain date. If you don’t fulfil these conditions, your welcome package will disappear.

Slot Game Variety

This is a crucial factor for any gambling website. The game assortment should be plentiful and varied, with enough titles and game types to satisfy a wide customer base. We also look into the types of slots, slot themes, and the number of reels on offer.

For example, the best slot sites for winning have everything between three-reel to twelve-reel slots. This, coupled with multiple paylines, increases your winning chances by making room for more winning combinations, bonus rounds, and oftentimes, hidden levels.

The wider the variety, the better, and that goes for game-design, too. The graphics, sound effects, and opportunities for interaction should all be top-notch and running smoothly. For instance, 3D slots offer an amazingly real-world casino experience, but you can download them as an app or play them directly from your browser.

Wagering Requirements

As mentioned, wagering requirements are the conditions you must meet before you can withdraw the bonus funds from promotional offers. Pretty much all slot sites have a unique set of criteria for these purposes. Of course, the lower, the better.

Here’s an example: a casino will reward you with a £60 bonus with a 5x wagering requirement when you make a £20 deposit. To see how much money you need to wager, you multiply the bonus by the wagering requirement: £60 x 5 = £300.

However, sometimes, you have to include the deposit in your bonus to gain access to your funds. Using the previous example, it would work like this: (£20 + £60) x 5 equals £400.

All UK online slots should have a specific web page explaining the wagering requirements as part of the company policy. That way, users can learn about what it takes to withdraw their bonus funds.

Banking Options

You can’t play if you can’t pay. Therefore, a plethora of payment options is essential to a casino’s standing. Since banking has evolved drastically over the years, many online casinos now provide as many different payment options to their users as possible, both for deposits and withdrawals.

Almost every platform will accept debit cards and wire transfers. PayPal slot sites are commonplace now, and e-wallet and cryptocurrency users will find themselves catered to, as well. We also check if deposits and withdrawals are equally seamless and quick.

User asset security is a top priority for us, so all our featured websites are highly regulated by government agencies to ensure customer safety. As a result, all casino transfers must be properly secured.

Customer Support

Even the best site cannot be entirely devoid of issues. When users run into some, it’s vital for them to be able to contact customer support for help. We examine the efficiency and level of support online casinos provide, as well as how many ways there are to reach them.

The operators of the best online slots in the UK should be available through multiple channels, such as social media, email, phone, live chat, etc. If the phone number is toll-free, that’s also a big plus.

The staff you come in contact with must be pleasant, dedicated, and competent. What’s more, any problem that arises should be solved in an orderly and timely fashion. Last but not least, there should be a knowledge base or an FAQ page for those who prefer self-service.

The Best Slot Sites in the UK in 2021

  • 1.Karamba - 100% match up to £200 bonus plus 100 free spins
  • 2.Grand Ivy - Match up to £1,500 on the first 3 deposits + 100 bonus spins
  • 3.Pokerstars Casino - 100 free spins
  • 4.William Hill - 100% match + 50 Free Spins
  • 5.Buzz Bingo - £30 bingo bonus on first deposit
Reviews

Short Operator Reviews

karamba casino logo
5 / 5

Karamba

Licenced by the UKGC

Reputable casino

Fantastic loyalty program

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Summary

The Karamba online casino has had a great reputation ever since its launch back in 2005. Today, it’s one of the UK’s most trustworthy online slots sites.

Karamba is operated by AG Communications Limited, a Malta-based company licensed by both the UK Gambling Commission and the Malta Gaming Authority. Karamba may seem small compared to other gambling houses hosting thousands of games, but this casino offers plenty of exclusive titles to keep you coming back for fun you can’t have anywhere else.

If you want to take a break from slots, you can take advantage of the sports-betting and scratch-game section. If you’re a fan of casino classics, don’t worry: You’ll find all the regulars here, as well as progressive slot games with exceptional graphics and experience. Karamba really is one of the best slot sites the UK has to offer. The online casino also includes cross-platform support for their games to be played via desktop, mobile, tablet, and even TV.

To make good on the welcome bonus, you need to deposit at least £10, and there’s a 35x wagering requirement. The minimum deposit/withdrawal amount is also £10. You can withdraw a total of £7,000 per month. However, Karamba also has a seven-tier loyalty program that allows larger withdrawals based on your level, as well as cash rewards for redeeming points. Aside from that, there are also various daily bonuses and promotions for users to explore and enjoy.

Karamba’s payment options and customer support are both excellent, even among independent slot sites. Payment options include credit/debit cards, bank transfers, e-wallets and many more. Their customer support is available from 06:00 to 23:00, seven days a week, and you’ll be speaking to polite and well-trained staff. You can reach customer support via live chat or email.

grand ivy casino logo
4 / 5

Grand Ivy

24/7 live chat support

Elegant design

Generous promotions

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Summary

A stylish online venue opened in 2015, Grand Ivy may look like something you’ll never be able to afford, but they do welcome players with all kinds of budgets. This casino is among the top slot sites because it treats every customer like a VIP. What’s more, Grand Ivy isn’t just glamorous – it’s also licensed by the UK Gambling Commission, ensuring all its operations are above-board.

As mentioned before, this casino emphasises the high-life in every aspect of the website. The elegant design allows for seamless navigation and experience. The majority of their selection consists of slots, but you can also find classic games like blackjack and roulette, as well as a live casino assortment. You can play games on your computer, tablet, or smartphone, as Grand Ivy is one of the best mobile slot sites.

High-rollers and cautious players alike can find something here, and the welcome bonus applies to everyone. It comes with a wagering requirement of 35x, and you have to spend your free spins within 72 hours.

The Grand Ivy Casino also has a VIP loyalty program, but this feature is primarily aimed at those who prefer to bet big. Still, even if you like low-stake bets better, staying loyal can pay off quite well. For example, Grand Ivy occasionally holds a promotion where registered users have a chance to win a Mercedes-Benz SLC 200 Sport. This makes them one of the best slot sites for winning.

In terms of customer support and banking options, Grand Ivy’s service is far from lacking. Unfortunately, you can only reach the support team via email and live chat, but the latter is available 24/7. The deposit limit is £20, whereas withdrawal limits depend on the payment option.

pokerstars casino logo
5 / 5

Pokerstars Casino

Numerous payment options

Real cash bonuses

Massive game library

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Summary

This casino was originally founded in Costa Rica, but they’re now serving customers across the globe. At the moment, Pokerstars casino is one of the top real-money slots sites in the world. The UK website is hosted by TSG Interactive Gaming Europe Limited, a Malta-based company licensed by the Malta Gaming Authority.

The first thing you’ll notice is the casino’s sleek, visually appealing design, with a neatly sectioned menu and game offer. As you might imagine, Pokerstars is big on poker, but they also have slot games in their extensive offer. How extensive is it? Well, there are over 1,600 games inside, for one. And if you can’t decide, you can switch to sports betting or enjoy poker in full VR experience.

For those there to play real-money slots in the UK, Pokerstars is the right place. However, there’s no official loyalty program or VIP club, but the Stars Rewards scheme incentivises players to stay. If you gather enough points, you can open six levels of chests for real cash bonuses. Other promotional bonuses include something called “Casino Races,” where users have a chance to win big, but the offer only lasts for a short time.

Pokerstars offers a wide variety of payment options, ranging from bank transfers to e-wallets, so if you have a preferred payment method, chances are that this casino supports it.

This UK online slots venue has great customer service agents, but there’s no phone or live chat feature to reach them quickly. The only way to contact them is by filling out a website form and waiting for someone to get back to you.

william hill casino logo
5 / 5

William Hill

Powered by Playtech

Constant promotions

Optimized for mobile

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Summary

William Hill casino knows the market well: After all, it’s been in business since 1934. Before opening his first betting shop in 1966, William Hill did everything over the phone. In its online form, the casino has been around since 2000. This long tradition makes it one of the most trustworthy online slot sites. The company operates from Gibraltar and holds licenses from both the UK Gambling Commission and the Gibraltar Gambling Commissioner.

This casino favours an aesthetically pleasing design, and everything on the site loads pretty quickly. They also have transparent guidelines about company policy and wagering requirements so all players can get the information easily.
Both old and new players can look forward to plenty of bonuses, promotions, and a VIP program. Beware, though, as the welcome bonus carries a 40x wagering requirement.

The game titles feature Playtech’s slots, poker, blackjack, etc. If you want something else, there’s also sports betting, esports betting, live casino, live dealers, and so on. As one of the biggest independent slot sites, William Hill makes sure it has something for everyone.

The choice of banking options is wide enough to cover all conventional methods and most of the unconventional ones, too. Payout and time limits depend on the method.

Customer-support-wise, William Hill tries to ease the contact, so you can reach its team by phone, email, live chat 24/7, and individual support pages for each customer group, such as casino players, poker players, and sportsbook customers.

buzz bingo logo
5 / 5

Buzz Bingo

Award-winning platform

No wagering requirements

Exceptional customer support

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Summary

“Britain’s Biggest Bingo Club”, Buzz Bingo certainly lives up to the hype. Buzz Bingo went all-in for its 2018 rembranding and is now one of the award-winning new slot sites UK players can enjoy, thanks to a partnership with Playtech. As you might expect, it focuses on bingo, but there’s plenty of slots, table games, and tournaments, too.

Buzz Bingo’s design won’t be everyone’s cup of tea: Everything is flashy and vividly coloured, with more than enough animations. Once your eyes adjust, however, you can enjoy seamless browsing.

The majority of the many promotions this site hosts are bingo-oriented, but bingo bonuses might get you free spins for slot games, too. The best thing about Buzz Bingo, however, is that it’s one of the best slot sites with no wagering requirements.

This great feature is a refreshing and welcome guest in our review. And if you were scared by all the bingo-talk, rest assured that this site hosts many online slots tournaments. These bonuses aren’t as huge as those at some other gambling houses, but BuzzBingo’s promotions are constantly updated.

On the downside, banking options are fairly limited. Aside from Visa and Mastercard debit payments, you can use PayPal and paysafecard. To help with customer support, Buzz Bingo has a dedicated community platform with exceptional customer support features. That connection with their players has made them one of the new slot sites in 2021, with the quickest-growing audience, counting a million or so people at the time of writing. You can reach them via email, live chat, or phone from 10 a.m. to 10 p.m., seven days a week. They also have an FAQ page and the “Chat Stars” live show, where players can ask questions.

casimba logo
5 / 5

Casimba

Dedicated app

Extensive responsible gaming features

Generous VIP program

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Summary

Casimba was founded in 2017, and this casino is one of the best new slot sites in the UK. You can expect a wide variety of games from renowned software providers. Casimba’s parent company, White Hat Gaming Limited, is licensed to operate in the UK, Malta, and Sweden.

Their website’s streamlined design allows for quick loading and no eye strain. Both the website and the downloadable app offer excellent functionality and user-friendliness. The Casimba game assortment is nothing to sneeze at, either. You can enjoy slots, roulette, blackjack, live casino, poker, baccarat, and more. All games can be played on desktop or smartphone, making Casimba one of the UK’s best mobile slot sites. The welcome bonus comes in three parts for your first three deposits, giving you the opportunity to win quite a bit of bonus cash. Of course, it carries a 35x wagering requirement. The generous VIP program may even reward players with a safari trip to Africa if they score enough points.

The banking options at Casimba are a bit limited, and withdrawals can take between two and five business days to verify. However, the aspect where Casimba excels the most is customer support, available via email or live chat at all times, and the well-trained staff will resolve issues as soon as they occur. What really makes Casimba stand out among the top slot sites is that customer support is available in English, French, German, Finnish, Norwegian and Swedish.

The operator also has an exceptional responsible gaming policy. Casimba made an effort to tackle this issue properly and protect customers from the potential harms of gambling. You can use the self-exclusion feature to prevent yourself from falling prey to compulsive gambling. Casimba also imposes daily deposit limits if the casino suspects someone is playing outside their means.

grosvenor casinos logo
4 / 5

Grosvenor Casinos

Decades of experience

Low wagering requirements

Fantastic mobile app

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Summary

There’s a good reason why Grosvenor Casinos is among the best slot sites the UK has to offer. Grosvenor has been in business since 1970 and has recently become a part of the Rank Group, one of the largest entertainment companies in Britain. There are 53 brick-and-mortar Grosvenor Casinos in the UK, making Grosvenor Casinos the country’s largest land-based operator.
It holds licenses from the UK Gambling Commission and the Alderney Gambling Control Commission, which allows it to operate in the UK, Ireland, Gibraltar, and Sweden.

Grosvenor’s website is a bit too simple in design for such an industry giant, but we wouldn’t trade the fact that this is one of the most trustworthy online slots sites today for all the fancy visuals in the world. What’s more, the functionality certainly makes up for the lack of aesthetic appeal. Grosvenor casinos have a lot to offer in the game department, too. You can play cards, table games, and slots in their regular and live versions, as well as enjoy sports and esports betting. The welcome bonus is fairly low, but the wagering requirement is just 5x.

Grosvenor recognised the mobile trend and has subsequently invested in game optimisation. As a result, both its mobile-browser and app version provide practically the same experience you would have on desktop, as expected from the best slot sites.

Banking options at Grosvenor are limited to debit cards, PayPal, and paysafecard, all from UK banks. You can also use “Grosvenor One”, the casino’s own e-wallet, to make both deposits and withdrawals. You can talk to Grosvenor customer support agents via email and live chat, Monday through Sunday, between 7 a.m. and 10:15 p.m. Your issues will be addressed by a polite and efficient staffer in a short timeframe.

888 casino logo
5 / 5

888 Casino

Three welcome bonuses

Rich game collection

Great mobile optimization

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Summary

For over two decades, 888 Casino has been one of the most-awarded UK slot sites. Its welcome bonuses, reasonable wagering requirements, and a great game assortment made this casino a household name in the industry. 888 was founded in 1997, and they are licensed by the UK Gambling Commission.

There are three ways to enjoy slots at this casino: Play at the online casino, download the platform to your desktop, or opt for the mobile casino. All three versions are visually appealing and provide a seamless experience.

But what really makes 888 Casino stand out from the competition is that it has not one, but two, but three welcome packages! First, a regular offer, then a premium option with a bonus code, and finally, the thing you want from all the best slot sites: A no-deposit bonus! All you have to do is register.

888 Casino prides itself on the rich game collection it brings to its customers. Aside from an abundance of NetEnt slot games, 888 has many games developed by their in-house developers, the same people who developed their platform. Of course, all the fan-favourites are also there, and you can find numerous live-dealer, video poker, and table games, as well as separate pages for poker and sports betting.

As mentioned, the three welcome bonuses at 888 make this casino one of the best slot sites for winning. You’ll get a no-deposit £88 free play which you must use within 14 days of getting a registration confirmation email. The regular welcome bonus is a 100% match-up on your first deposit, up to £140, with a 30x wagering requirement.

Banking options at 888 Casino are diverse: You can choose from bank transfers, e-wallets, and popular card companies. The casino’s excellent customer support only comes via email, unfortunately, or you can try to address your issue with the help of the detailed FAQ page.

rizk casino logo
5 / 5

Rizk

Free sign-up bonus

New-player friendly

Fully licenced

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Summary

Founded in 2016, Rizk is one of the relatively new slot sites with a free sign-up bonus. It holds licenses from both the UK Gambling Commission and the Malta Gaming Authority. Captain Rizk, the casino mascot, is a spandex-wearing comic relief character with a trusty sidekick, Lucky the super dog – a unique approach to branding, to say the least.

The superhero theme is everywhere on the website, but don’t worry about the graphics messing up performance: The design is responsive across platforms. The interface is easy to navigate and quite forgiving, especially towards new players.

On Rizk, you can play slots, table games, live games, and many more. The excellent bonus offer gets you free spins, and this is one of the best slot sites with no wagering requirement, so you can get your extras as soon as you register. The famous “Wheel of Rizk” lets you win additional rewards, too: Simply put, Rizk knows how to reward its customers.

Banking options are few: You can use debit cards or at Rizk are limited but on point with credit cards and eWallet options. Their customer support is worthy of superhero status, though, and in multiple languages too.

Thanks to this dedication level, Rizk is undoubtedly one of the best slot sites for UK players. The company team cares about their customers, even winning rewards in the support department. And no wonder: You can send an email, connect to live chat, request a call-back, or take a look at the FAQ section.

all british casino logo
5 / 5

All British Casino

Great game variety

UK-exclusive bonuses

Trustworthy venue

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Summary

UK players are the primary target for this casino. Operating under L&L Europe Ltd, All British Casino is a product of innovation designed for a localised gaming community. The best online slots the UK has in store found their home in All British Casino, a venue licensed by both the UK Gambling Commission and the Malta Gaming Authority.

The website works quite smoothly, all while making you feel proud to be British. That said, there’s no political message here, only an innovative design targeted at a specific group of players. The All British host of games is plentiful: A wide variety of slots, blackjack, and roulette games to welcome every guest. Aside from that, they can also enjoy live dealer casino games.
You get a 100% match, up to £100, with a 10% cash back. This makes All British Casino one of the best sites for playing real-money slots in the UK. Obviously, the bonuses are UK-exclusive, and there’s a 35x requirement you have to complete within 30 days.

Banking options include debit cards, wire transfers, and several e-wallets. Fortunately, the casino offers multi-channel customer support that includes phone, email, an FAQ page, and a live chat feature available from 7 a.m. to 12 a.m. (BST).
Another thing distinguishing All British Casino as a trustworthy venue is the self-exclusion option for players struggling with gambling addiction.

Frequently Asked Questions (FAQ)

What is the best online slots site?

The best slot sites are determined by the players themselves. We can only make recommendations based on our objective reviews, but it’s up to the customers to choose the best based on their personal preferences.

Which online slots payout the most?

That depends on various factors. For example, you can increase your odds of winning by playing slot games with more winning combinations and features, like those with more reels. You can also check out a site’s bonuses and progressive jackpots and start from there.

Are online slots rigged?

Some casinos will try to scam you, but those get blacklisted before long. Besides, we review only the best UK slot sites, and those are all legit. Win or lose, it comes down to luck and strategy.

Do high-limit slots pay better?

Technically, they do. A high-limit bet makes you a high roller. The more you bet, the more you’ll win compared to lower-stakes slots. However, you’re also at risk of losing more in such circumstances.

Can you win big on online slots?

Some progressive jackpots go as high as millions in rewards, so yes, you always have a chance of winning big on slot sites with a bit of luck.