Best Slots Sites UK 2026 – Play Top Online Slots for Real Money

Yet you must choose the right casino site along with the right game to play. The best slot sites UK that offer the highest payout online slots combine high RTP games with secure payments, fast withdrawals, generous bonuses and licensed gaming environments. Follow our guide to the best payout online slots now.

Best UK Slots Sites – Top Casinos for Real Money Slots (June 2026)

The casinos listed below are the best payout slots UK sites we recommend joining for playing the best payout online slots in the UK.

1.      bet365 – Wide selection of premium high RTP slots

2.      Betway – Popular jackpots and rewarding slot tournaments

3.      Betrino – Fast payouts and feature-rich slot games

4.      10Bet – High-paying slots with generous bonus features

5.      Casumo – Innovative slots experience with top RTP titles

6.      Pub Casino – Mobile-friendly casino with rewarding slot variety

7.      Grosvenor – Trusted UK casino with classic real money slot games

*18+. T&Cs apply. Play responsibly!

Best Payout Slot Sites for UK Players– Chosen by Our Experts

You can discover more about our top seven best payout slot sites in the short platform reviews below.

bet365 – Premium High RTP Slots from Top Developers

bet365 Casino has built a strong reputation in the UK online gambling market, thanks to its extensive slot catalogue with the best payout slots UK, competitive RTP games and trusted gaming environment. Licensed and regulated by the UK Gambling Commission, the platform offers you a secure and reliable experience.

bet365 features thousands of highest payout online slots games, including classic reels, Megaways titles, progressive jackpots and exclusive releases developed through partnerships with major software studios. Leading providers like Playtech, NetEnt, Microgaming, Pragmatic Play, Yggdrasil and others supply the lobby with slots. This ensures you have access to a diverse portfolio of high-quality slots that include modern features.

Several games at bet365 Casino offer RTP rates above 97%, such as 1429 Uncharted Seas and Børk the Berzerker. This makes one of the best online slots UK platforms particularly appealing for players seeking high-paying slot games. One of the casino’s standout features is its selection of exclusive and branded slot titles, alongside regular slot tournaments and jackpot events. bet365 also performs well on mobile devices, offering smooth gameplay and fast-loading best payout online slots across desktop and iOS/Android compatible apps.

Pros:

·         Wide range of high payout slot games

·         Strong portfolio of leading software developers

·         Intuitive design of the website and apps

Cons:

·         Strict, drawn-out verification process

·         Some bonuses include restrictive terms

·         Casino promotions can be limited

18+. T&Cs apply. Play responsibly.

Play Online Slots at bet365!

Betway – Featuring High-Paying Slots with Trusted UKGC Security

Betway Casino is one of the UK’s most established online gambling brands, offering a polished UK slot sites experience. It is backed by a UK Gambling Commission licence and has a strong reputation for reliability. The casino lobby features hundreds of real money slots, including Megaways titles, progressive jackpots, branded slots and more. Its platform focuses heavily on slot gaming, with easy navigation, mobile optimisation and regular promotional offers for highest payout online slots fans.

The portfolio of leading software developers catering to the Betway lobby is impressive, too. Brands like Pragmatic Play, Ash Gaming, Games Global, NetEnt and many others ensure there is plenty to play at the site. This selection creates a mixture of classic slots and modern high-volatility titles with strong payout potential. Several of the best payout online slots through Betway feature RTP rates of 96%-97%, making it extra appealing for players looking for higher return potential.

Alongside this, the best payout slots UK casino stands out for its smooth gameplay functionality across desktop and mobile devices. Its UKGC licence is further backed up by eCOGRA-certified games, which provides additional confidence regarding fairness, RTP transparency and player protection.

Pros:

·         Excellent range of top software providers

·         Top payout rate of over 98%

·         SSL encryption and part of eCOGRA

Cons:

·         Some withdrawal delays reported

·         Not all games are available on the mobile app

·         Welcome bonus only claimable via debit card deposits

18+. T&Cs apply. Play responsibly.

Join and Play at Betway Now!

Betrino – Diverse Collection of High-Payout Slots from Niche Developers

Betrino takes a slightly different approach to online slots real money when you compare it with many mainstream UK casino brands. It focuses heavily on variety and lesser-known game studios alongside the industry’s biggest names. The best payout online slots site is still licensed by the UKGC and is operated by ProgressPlay Limited. So, the casino delivers a secure environment with a growing reputation as one of the best UK slot sites.

The best payout online slots platform is particularly appealing to players who enjoy exploring newer releases, Megaways slots and higher volatility titles. Its lobby plays host to over 2,500 games, with slots making up most of the library. You can access titles from well-known providers like NetEnt, Play’n GO and Blueprint Gaming. Yet you can also play releases from smaller developers, such as Chance Interactive and Old Skool Studios. This presents a fresher feel for players joining and playing at Betrino.

It’s also a casino that performs well for those seeking highest payout online slots and jackpot content. Many games sit within the popular 96%+ RTP range. Plus, with jackpot games like Unicorn Bliss Jackpot and Stampede Super Jackpot, there is the opportunity to try for some big payouts.

Pros:

·         Huge choice of Megaways and jackpot slots

·         Mix of major and niche software developers

·         Live chat is open 24/7

Cons:

·         Limited filters to use in the game lobby

·         No exclusive slot titles to play

·         All withdrawals are subject to a fee of 1%

18+. T&Cs apply. Play responsibly.

Discover the Selection of Slots at Betrino!

10Bet – Strong Jackpot Variety and Generous Bonus Offers

A long-established UK gaming brand, 10Bet combines a great sportsbook with a solid best payout online slot sites offering. Fully licensed by the UK Gambling Commission, it provides a safe and regulated environment for players seeking to enjoy real money slots with competitive payout potential. Among the best payout slots UK platform features a large library of slot games, including classic titles, modern releases and a great range of progressive jackpots.

In terms of slots quality, 10Bet performs well, thanks to partnerships with leading providers. This includes hosting software from developer like Games Global, Hacksaw Gaming, Playtech, Red Tiger, Quickspin and various others. As a result, you can play some fantastic best payout online slots like Epic Ape, Big Bass Splash, Eye of Horus, Gates of Olympus and a strong selection of other titles.

Yet it is perhaps the jackpot titles and the bonuses that 10Bet offers that help it stand out more so. You can win big on games like Buffalo Blitz Megaways, Age of the Gods: Cash Collect and so on. Once you receive the welcome offer of up to £25, you can claim various ongoing promotions too, including 25 free spins via the mobile app.

Pros:

·         Great choice of slot games from Pragmatic Play

·         Large jackpot titles and rewarding bonuses

·         Low deposit options

Cons:

·         Live chat is not offered 24/7

·         Limited standout exclusive slot games

·         Bonus must be wagered within three days

18+. T&Cs apply. Play responsibly.

Experience 10Bet and Its Slot Games Today!

Casumo – Gamified High-RTP Slots with Innovative Gameplay

Casumo Casino is a UK Gambling Commission-licensed operator, known for its gamified, modern approach to some of the highest payout online slots gaming. Rather than focusing only on traditional gameplay, Casumo adds a layer of profession-style features, challenges and rewards that make the experience feel more interactive. Its slot library is extensive, featuring thousands of titles and a strong mix of high-volatility and high-RTP games. These come from leading developers like NetEnt, Microgaming, Play’n GO, Yggdrasil and so on.

In terms of RTP and payouts, Casumo offers a competitive selection. Many popular best payout online slots sit in the mid-to-high 96%+ range, alongside a dedicated jackpot hub for larger win potential. The lobby also includes “Drops & Wins” style prize features and tournaments, which add extra payout opportunities beyond standard spins.

Game fairness at the site is supported by certified RNG systems and independently tested software providers, ensuring transparency and reliability. Overall, the site delivers a polished and entertaining slots experience. This is especially true for players who enjoy variety, modern mechanics and a more interactive casino environment.

Pros:

·         Innovative gamified features and rewards system

·         Huge selection of high-quality and high payout slot games

·         Different and varied responsible gambling tools

Cons:

·         Limited choice of withdrawal methods

·         No loyalty rewards available

·         Craps and some poker variants not available

18+. T&Cs apply. Play responsibly.

Try the Gamified Setup at Casumo Today!

Pub Casino – Speedy Payouts and Mobile-Friendly Slots

Pub Casino is one of several modern best payout slots UK. It has quickly built up a reputation for its strong focus on slot variety, fast withdrawals and its mobile-friendly website. The casino also offers some wonderfully competitive bonus promotions. Fully licensed by the Gambling Commission of the UK, it operates as a secure and regulated casino, welcoming British players who want access to a wide range of online slots real money.

Thousands of games are present in its game lobby, including best payout online slots from major providers like Play’n GO, Blueprint Gaming, Playtech, NetEnt, Games Global and iSoftBet to name a few. Therefore, you can enjoy a superb range of titles existing in various formats, including Megaways releases and jackpots. Many of the slots also come with excellent RTP rates above 96%.

The exclusive promotions serve the site well, as does the chance to participate in some exciting best UK slot sites tournaments. Thus, you have extra chances to boost your winnings beyond the standard slot gameplay. Overall, it’s a smooth and mobile-friendly casino, featuring quick withdrawals and a straightforward gaming interface.

Pros:

·         Fast withdrawal processing within 24-48 hours

·         Offers various secure payment methods

·         Mobile-friendly website and games

Cons:

·         Limited live chat operational hours

·         No telephone support

·         Limited standout exclusive slot titles

18+. T&Cs apply. Play responsibly.

See What the Pub Casino Site Can Provide to You Here!

Grosvenor – Trusted UKGC Casino with Classic, Respected Online Slots

Grosvenor Casino is another well-known, established gaming brand, holding a licence from the UK Gambling Commission. It offers a straightforward and trusted slots gaming experience. Being a part of the Rank Group, it benefits from a strong reputation built across both land-based and online casinos. Thus, players have confidence in the fairness, security and responsible gaming standards of Grosvenor.

In terms of real money slots, the site focuses on quality over overwhelming quantity, with a library of around 1,000 games. The selection within the lobby includes major and respected titles from leading providers like NetEnt, Pragmatic Play, Games Global, Bally, WMS and others. Live games come from Evolution, so you can have that land-based experience while playing online, too. RTP performance is generally competitive, with averages reported around the mid-95% up to 97% range.

While Grosvenor doesn’t rely heavily on flashy exclusives or experimental mechanics, it does offer a stable, well-curated highest payout online slots experience. It also offers smooth mobile performance and fast withdrawals, making it appealing to players who value reliability over gimmicks.

Pros:

·         Strong UKGC-licensed and trusted brand reputation

·         Fast withdrawals and smooth mobile experience

·         Mobile casino app for Android and iOS

Cons:

·         No game provider filter in the lobby

·         Smaller collection of promotional features

·         Bonuses unavailable via deposits with PayPal or Paysafecard

18+. T&Cs apply. Play responsibly.

Check out Grosvenor Casino and the Slots Selection!

Best Payout Online Slots by Type

The best UK slot sites tend to feature a variety of these games. Different slots appeal to different players. So, here is a rundown of the types of online slots real money you can find at the top UK casinos.

Classic Slots

·         Mega Joker

·         Sizzling Hot

·         Fruit Cocktail

Classic slots are the simplest and most traditional type of online slot games, designed to replicate early mechanical machines found in physical casinos. They typically feature three reels and a limited number of palucksylines, often ranging from one to five. Symbols on the reels usually include fruits, 7s, BARs, bells and so on, keeping gameplay straightforward and easy to understand. These slots usually have low to medium volatility levels, making wins more frequent but smaller in size. Because of their simplicity, they are ideal for beginners or players who prefer a relaxed, no-frills gaming experience. You can find them on the best slot sites UK players trust, including many best payout online slots lists.

Video Slots

·         Starburst

·         Book of Dead

·         Gonzo’s Quest

Video slots are the most popular type of online slot games, offering advanced graphics, animations and immersive sound effects. Unlike classic slots, they usually feature five reels and multiple paylines, along with a wide range of bonus features such as free spins, wild symbols, scatters and multipliers. They can even include interactive mini games within. As some of the best payout online slots available, video slots often follow exciting themes like mythology, adventure, movies, fantasy worlds, ancient civilisations and so on. They can vary widely in volatility, from low-risk frequent wins to high-risk, high-reward gameplay.

Megaways Slots

·         Bonanza Megaways

·         Extra Chilli Megaways

·         Buffalo King Megaways

Megaways slots use a dynamic reel system, allowing the number of symbols landing on each reel to change per spin. This creates a massive number of possible winning combinations – often up to 100,000 ways to win and beyond. Developed originally by Big Time Gaming, this mechanic has been widely adopted by other providers. Each spin can produce a different reel layout, making gameplay unpredictable and highly exciting. Megaways slots typically include cascading reels, free spins, multipliers and bonus rounds to increase winning potential.

Progressive Slots

·         Mega Moolah

·         Divine Fortune

·         Age of the Gods

Progressive slots are linked to a shared jackpot that increases whenever a player places a wager across a network of casinos. A small portion of each wager contributes to the growing prize pool. This continues to rise until one lucky player hits the winning combination or trigger. Progressive jackpots can reach life-changing amounts, sometimes in the millions. They also usually have lower base game returns to balance the jackpot potential, but they offer the excitement of chasing a constantly growing prize at some of the best UK slot sites.

Jackpot Slots

·         Jackpot 6000

·         9 Pots of Gold

·         Wolf Gold

Jackpot slots are games that offer large prize payouts, either as fixed jackpots or randomly triggered rewards within the game. Unlike progressive slots, fixed jackpots do not increase over time but still offer substantial top prizes. Many jackpot slots include bonus rounds, pick-and-win features or special symbol combinations that unlock the jackpot prize. Some also combine jackpot mechanics with free spins or multipliers to increase winning potential. These highest payout online slots appeal to players who enjoy high-risk, high-reward gameplay and the thrill of landing a significant win during regular gameplay or bonus features.

What Is RTP?

RTP stands for Return to Player. This highlights the percentage of wagered money a slot game is designed to pay back to you over a long timeframe. For example, some of the best payout slots UK game that has a 97% RTP rate will theoretically return £97 for every £100 you wager on it. Results can vary greatly in the short term, though. You can use RTP to compare games and identify slots that may offer better long-term value. While RTP does not guarantee wins, choosing higher RTP slots can improve overall payout potential over time, especially for regular players.

·         High RTP Slots: Usually 96.50% or higher. These slots are considered more player-friendly and often attract experienced players and those looking for the best payout online slots.

·         Average RTP Slots: Typically, between 95% and 96.40%. These are the most common online slots and balance entertainment.

·         Low RTP Slots: Generally below 95%. These games may feature larger jackpots or bonus mechanics but statistically return less money over time.

5 Tips When Looking for The Best Payout Online Slots

To give yourself the best experience when playing the best payout slots UK, here are some tips to remember:

Check the RTP Percentage

One of the most important factors when choosing highest payout online slot is the RTP rate. As noted earlier, this highlights the theoretical amount a game pays back to you over time. Thus, it’s a useful guide when comparing slots to play. Higher RTP slots, usually above 96%, generally offer better long-term value and can help extend your bankroll.

While RTP does not guarantee wins, it can improve your chances over many gaming sessions. You should also compare RTP alongside volatility, as some high RTP games may still involve long periods without significant wins due to higher-risk gameplay mechanics.

Look at Bonus Features

Modern online slots often include bonus features that can significantly improve gameplay and winning potential. Additions like free spins, multipliers, wild symbols, cascading reels, expanding symbols and bonus rounds all add excitement and extra payout opportunities. Some of the best slot sites also include gamble features or jackpot rounds, further increasing engagement.

Before selectin a slot, you should review how these bonuses work and whether they suit your preferred style of play. Feature-rich slots are often more entertaining over longer sessions and can provide more ways to win.

Consider Slot Volatility

Volatility refers to how often and how much a slot tends to pay out. Low volatility slots offer smaller but more frequent wins, making them suitable for casual players or those with smaller budgets. High volatility slots pay less often but can deliver much larger prizes when wins occur. Understanding volatility is important because it helps you choose games that match your bankroll and risk tolerance.

If you’re chasing large jackpots, then you may prefer high volatility best payout slots UK, while if you’re wanting longer playing sessions, a lower volatility game with steadier payouts may be a better option.

Explore Game Variety and Themes

The best online slots sites now offer thousands of slot games with different themes, mechanics and gameplay styles. Choosing a slot with a theme you genuinely enjoy can make the experience much more entertaining. Popular themes include mythology, ancient civilisations, adventure, movies, music and even classic fruit machines.

It is also worth exploring different mechanics such as Megaways, cluster pays or cascading reels to keep gameplay fresh. Best payout slots UK with strong game variety allow you to switch between different slot types easily. This helps you discover new favourites and avoid repetitive gameplay.

Mobile Slots

Many gamers now enjoy the best payout online slots on smartphones and tablets, so mobile compatibility is increasingly important. A good mobile slot should load quickly, displays clearly on smaller screens and maintain smooth gameplay without lag or glitches. Most modern casinos offer HTML5 slots that adapt automatically to different devices. This allows you to access games through mobile browsers or dedicated casino apps.

Mobile-friendly highest payout online slots also make it easier to play on the go without sacrificing graphics, bonus features or overall quality. Before depositing money, make sure you check whether the casino and its slots perform reliably on your preferred device.

Casino Bonuses That Offer the Best Payout Value

Different bonuses are available to claim at the different highest payout online slots sites. Here is some further insight into the bonus types you can claim:

Welcome Bonus

A welcome bonus is one of the most common promotions offered by online casinos to attract new players. It usually appears as a deposit match, where the casino adds extra funds based on your first deposit. For example, a 100% welcome bonus up to £200 doubles your initial deposit amount within the stated limit.

Some of the best payout slots UK sites also combine welcome offers, adding free spins and other perks into the package. These reward you over several deposits. Welcome bonuses are designed to give you a larger starting bankroll as a newcomer, as well as more time to explore the casino.

Free Spins Bonus

A free spins bonus gives you a set number of spins on selected slot games without having to use your own balance on them. These promotions are popular because they allow you to try games and potentially win online slots real money while reducing your own personal risk. Free spins can also be included in welcome packages, as well as reload perks and more.

Winnings earned from using free spins are usually subject to wagering requirements before you can withdraw them. Best payout slots UK Casinos usually apply free spins to specific slots as well – commonly on popular titles from providers like NetEnt or Pragmatic Play.

Cashback Bonus

A cashback bonus returns a percentage of your net losses across a certain timeframe. This helps reduce the financial impact of unsuccessful gaming sessions on best payout online slots or other casino games. Unlike many traditional bonuses, cashback offers are often viewed as lower risk because they reward you even when you don’t win. These promotions can be awarded to you daily, weekly or monthly.

Percentages of cashback typically range from 5% to 25%. Sometimes, the amount increases as you ascend the VIP ladder. Some casino cashback bonuses are credited automatically, while others require you to opt in manually.

Reload Bonus

A reload bonus works in the same way as a welcome bonus does but is aimed at existing players instead of newcomers. These bonuses encourage continued gameplay by rewarding your additional deposits with extra funds or free spins. So, for example, best slot sites UK may offer a 50% reload bonus every Wednesday or at the weekend.

Reload bonuses are commonly used by regular players looking to increase their bankroll and extend gameplay at best payout online slots without depositing significantly larger amounts. Terms can vary depending upon the casino, including wagering requirements, qualifying games and minimum deposits.

VIP/Loyalty Program Bonus

VIP and loyalty program bonuses are designed to reward regular players for ongoing activity at some of the best payout slots UK sites. You typically earn points when you place bets or make deposits, which can unlock higher membership tiers and exclusive rewards. Benefits may include higher cashback percentages, free spins rewards, personalised bonuses, priority withdrawals and even dedicated account managers.

Some best payout online slots sites also offer birthday rewards or luxury gifts at higher tiers. Loyalty schemes are especially attractive to high-volume players who gamble regularly and want long-term value. A strong VIP program can significantly improve the overall casino experience.

Top 5 Best Payout Slot Games

You may have heard of some of the best payout online slots, but others perhaps not. The five slots outlined below are the slot games we suggest playing for the best experience.

Starburst – Simple Gameplay with Frequent Colourful Wins

Starburst is one of the most recognisable real money slots ever created. Developed by NetEnt, it offers a five-reel, 10-payline (win-both-ways) slot, which is famous for its easy-to-understand gameplay. It also provides vibrant neon visuals and a low volatility structure. Thus, it is especially popular with beginners and casual players. The game also has an RTP rate of around 96.10%, offering balanced long-term high payout potential.

The standout feature of Starburst is its expanding wild mechanic, where wilds stretch across entire reels and trigger re-spins, creating additional winning opportunities. Unlike many modern real money slots, this NetEnt game keeps things straightforward without complicated bonus rounds or jackpots. Its simplicity, smooth mobile gameplay and frequent payouts ensure it remains one of the UK’s most played online slots.

Book of Dead – High Volatility Adventure with Nice Win Potential

Book of Dead, created by Play’n GO, is a high volatility video slot inspired by ancient Egyptian exploration themes and an essential part of the game library of all the best slots sites. The game comes with five reels and 10 paylines, offering an RTP rate of around 96.20%. It is especially popular among players who enjoy high-risk, high-reward gameplay and large payouts slots.

The key feature in Book of Dead is the free spins round, which triggers whenever three scattered wilds land anywhere. Before this round begins, a randomly selected symbol is chosen to expand during it. This can create huge winning combinations across multiple reels. The wild substitutions remain an integral part of the slot too, while cinematic graphics add to its adventurous atmosphere.

Mega Moolah – Legendary Progressive Jackpot with Millionaire Payouts

As one of the world’s most famous progressive jackpot slots, Mega Moolah has created several millionaires around the globe. Developed by Games Global (formerly Microgaming), this five-reel video slot has become legendary with its payouts. The game’s RTP rate is only around 88%, which is considerably low when compared to some other highest payout online slots. However, the huge progressive jackpot significant increases its overall prize appeal.

Mega Moolah is known for high volatility, meaning regular wins may be smaller or less frequent while you chase the enormous jackpot potential. The game features an African safari theme and also includes free spins and multipliers alongside the four-tier jackpot system. Any UK slots site featuring this game is sure to offer potential for high winnings.

Gonzo’s Quest – Cascading Reels with Avalanche Win Mechanics

Another hugely successful slot release from NetEnt, Gonzo’s Quest introduced the popular avalanche reel mechanic to best payout online slots. This five-reel video slot follows the adventures of explorer Gonzo, who is searching for the lost city of El Dorado. Instead of traditional spinning reels, winning symbols disappear and are replaced by new ones falling into place. Every time this happens, a win multiplier increases for subsequent drops on the same spin.

The slot has an RTP of around 95.97% and a medium volatility level. It balances regular payouts with the possibility of larger wins during bonus features. Free spins include increasing multipliers, which can boost your payouts. The game is widely praised for its innovative gameplay, cinematic design and engaging balance between entertainment and payout potential.

Gates of Olympus – Massive Multipliers and High Volatility Gameplay

This is an online slot from the Pragmatic Play brand, offering a highly popular high-volatility video slot inspired by Greek mythology. Gates of Olympus uses a 6x5 game grid system with a “pay anywhere” mechanic, rather than traditional paylines. Thus, rewards come when enough matching symbols appear on the grid anywhere. Its RTP is approximately 96.50%, placing it among the stronger-paying modern online slots.

The main attraction of the game is its multiplier feature, where Zeus can randomly award multipliers of up to 500x during both base gameplay and free spins. The slot also uses cascading symbols, allowing consecutive wins from a single spin. Gates of Olympus is known for dramatic win potential, energetic visuals and highly volatile gameplay, suitable for players chasing larger payouts.

Conclusion

Finding the best payout online slots in the UK involves more than simply choosing the biggest jackpots. You should compare RTP percentages, volatility, bonus features and the quality of the casino itself. The best payout slots UK sites combine trusted UKGC licensing, strong software providers, secure payments and a wide selection of highest payout online slots. This guide has highlighted the best sites to join and the best games to play for an exciting online experience.

FAQ

What Are High Payout Slots?

High payout slots are games with higher RTP (Return to Player) percentages, usually above 96%. These slots are designed to return more money to players over time compared to lower RTP games.

Are High RTP Slots Better for Winning?

Higher RTP slots can improve long-term payout potential, but they do not guarantee short-term wins. Volatility and gameplay style also affect how often and how much a slot pays.

What Is Considered a Good RTP for Online Slots?

An RTP of 96% or higher is generally considered strong for online slots. Many popular highest payout online slots fall within the 96-97% RTP range.

Can I Play High Payout Slots on Mobile?

Yes, best UK slot sites offer mobile-compatible high RTP slots that work smoothly on smartphones and tablets via an app or a mobile browser.

What Types of Slots Are High Payout Options to Play?

High payout slots can be any type of slot game. Thus, you can experience high-paying video slots, classic slots, Megaways slots, jackpot slots and more. Progressive jackpots offer some of the highest payouts at the best slots sites UK.