Online casino gambling is popular in the UK, but since there are so many options available for UK slot sites and games, it can be hard to know where to start and what to play.

The CasinoWizard team has used their extensive experience, skills, and player feedback to compile the best UK slots and UK slot sites for you.

Top UK slot sites based on RTPs

What makes an online casino in the UK great?

Firstly, the casino needs to be approved and locally licensed by the United Kingdom Gambling Commission (UKGC).

Then, we expect the UK slot site to offer players the best slots combined with new games. The site has to be user-friendly, safe, and reliable and provide world-class support while giving players a wide range of payment options.

However, the UK slot site must offer players high RTP levels to separate the best from the greats.

Most UK slots are created with various RTP configurations; far from all, casinos offer players the best-paying options.

These are the best UK slot sites with the highest RTP slot versions:

Different RTP configurations in UK slots

Did you know that most UK slots are available in various RTP versions?

Let’s have a look at an example.

Starburst from NetEnt is available in six RTP configurations that average a payout of 90.05%, 92.05%, 93.05%, 94.05%, 95.05%, or 96.09%.


A few percentages here and there, why does this matter?

To show you what the effects of a higher Starburst RTP compared to a lower Return to Player really are, we have done some calculations.

Based on a starting balance of €/£/$/100 and a stake of €/£/$/1 per spin, we can determine per RTP configuration how many spins it will theoretically take (excluding variance) before you run out of funds.

How many spins does it take before your balance goes below €/£/$ 1?

Starburst RTP Number of Spins
96.09%2,531 spins
95.05%2,000 spins
94.05%1,663 spins
93.05%1,424 spins
92.05%1,245 spins
90.05%994 spins

This applies to most new and old slots. The issue is that it can be difficult to know where to find the highest RTP versions, but this is Casinowizard’s specialty, as he has done the research and guides you toward the best RTP options in each slot review.

For example, here is an overview of LeoVegas RTP score per provider:

Best UK Slots & highest payout versions

Finding the highest RTP versions of the best UK online slots can be challenging, so we have compiled this list for you.

You can play your favourite games on these top UK slot sites while knowing you are playing with the best odds.

Best Online Slots Real Money UK – Top 10 popular UK slots and where to play the best RTP versions:

Best UK slot site for Pragmatic Play slots

After amazing casino game releases like Big Bass Splash, Big Bass Bonanza, Gates of Olympus 1000, Sweet Bonanza, and many more UK slots, Pragmatic Play is the hottest game studio in the world.


The best slot sites in the UK for Pragmatic Play slots are Rizk and MrQ.

These UKCG-licensed online casinos not only offer you the full portfolio of PP slots but also, more importantly, at Rizk casino and MrQ, you play them on the highest RTP version.

Playing Pragmatic Play slots at Rizk and MrQ maximizes your chances of winning and lengthens your entertainment time on average as you play with the best odds at this premium online casino.

Best UK slot site for Play’n GO slots

Play’n GO is another well-known game studio with a UKGC license offering UK players some of the best slots.

This slot developer is mainly known for being the creator of Book of Dead and Legacy of Dead, but in their portfolio of games, we also find top titles like Rise of Olympus and more.


Play’n GO is also a fan of rock-themed slots and has released games like Kiss, Led Zeppelin, Alice Cooper, and ZZ TOP.

The best UK slot sites for Play’n GO slots are Rizk Casino and Dream Vegas, as here you play the games with the highest RTP version.

Best UK slot sites for Hacksaw Gaming slots

Hacksaw Gaming is one of the most exciting game studios in the UK online casino space. The company started by creating scratch cards but later moved on to experimenting with slot games as well, and oh boy, we are happy that they decided to do that.

Hacksaw Gaming slots can constantly be found in UK slot sites’ most popular game lobbies as they release so many good games.

Some popular and familiar titles include Chaos Crew, The Bowery Boys, and Feel the Beat.


Two premium UK slot sites offer these Hacksaw Gaming slots to their players at the highest RTP levels. These are Rizk and LeoVegas.

Best UK slot sites for NetEnt slots

NetEnt is one of the game studios that was around already in the early days of online casinos.

They are mainly known for their old-time classics like Starburst and Twin Spin, but another UK favourite is the slot about the rock band Guns N´Roses. You can enjoy listening to some of their hits while spinning away in this slot.


New NetEnt slots are always released with various RTP configurations, but three excellent UK slot sites that let you play NetEnt games on the highest payout versions are CasinoCasino, Dream Vegas, and Playojo.

How do we rate the best UK slot sites?

When researching and rating UK slot sites to find the best ones,  our experienced CasinoWizard team looks at many factors, including:

  • UKGC-licensed online casino: All casinos listed here on this page are properly licensed by the UKGC and are safe options that follow the latest regulations and requirements regarding player protection measures.
  • The slot selection: To qualify as a premium UK slot site, the casino has to cooperate with the best game studios to offer players an extensive slot selection, including popular & new slots, jackpots, Megaways, and classics.
  • RTP versions on offer: We want to get the most out of hard-earned cash by playing real money online UK slots with the highest payout percentages. Since slots are available with various RTP configurations, this isn’t always the case but is a requirement to qualify as a “best UK slot site” here on
  • Trustworthiness: Although each UKGC-licensed casino needs to follow strict regulations and rules, the owners of the UK online casino must also be reliable and trustworthy.
  • Payment options: Offering players the most popular payment methods is a must, but the casino will ideally also offer their players some other less-known options. 

UK Slots with the overall highest RTPs

We also got you covered if you are looking for UK slots with the highest overall payout percentages.

These games are available in the best UK slot sites, offering players the highest long-term RTP percentages. Note that in some cases, various RTP versions of the game might be available:

UK SlotRTPAvailable at UK slot site
Book of 9999.00%Rizk
Mega Joker99.00%LeoVegas
Marching Legions98.12%Dream Vegas
1429 Uncharted Seas98.00%Yeti Casino
Money Cart 298.00%CasinoCasino
Rainbow Riches Pick’n’mix 98.00%Rizk
Blood Suckers97.99%Hyper
Blood Suckers Megaways   97.66%Yeti Casino
Big Bad Wolf 97.35%Dream Vegas

In case you are looking for Top 5 Megaways UK slots with the highest RTPs, then play these games:

Megaways SlotRTP Available at UK slot site
Blood Suckers Megaways   97.66%Rizk
Gorilla Gold Megaways   97.24%Yeti Casino
Queen of Riches Megaways 97.01%Dream Vegas
Primal Megaways97.00%CasinoCasino
Castle Of Terror96.90%Hyper

How we review UK slots

Slots are our favorite casino games, and we have reviewed and listed more than 1,000 UK slots here on

Our specialty is to find the best UK slot sites that offer players the highest RTP versions of each slot. However, we also love playing slots and review them by using the following setup:

  • Introduction
  • RTP options and where to play on the best version
  • Gameplay and features
  • Max win info
  • Summary and score

When listing the best UK slots online here, we also factor in the game’s popularity among UK players.

Top 20 slots UK

These are currently the top 20 most popular UK slots based on the overall visibility on UK slot sites:

PositionUK SlotGame studio
1Big Bass Splash Pragmatic Play
2Big Bass BonanzaPragmatic Play
3Book of DeadPlay’n GO
4Gold Blitz Extreme Games Global
5Gold BlitzGames Global
6Fluffy FavouritesEyecon
8Rome Fight For Gold DeluxeGames Global
9Rising RewardsGames Global
10Bonanza  Big Time Gaming
113 Lucky Hippos Games Global
129 Pots of Gold  Games Global
13Rainbow Riches  Barcrest
14Legacy of DeadPlay’n GO
15Gold Cash Free SpinsInspired
169 Masks of Fire Games Global
17Blazing Bison Gold Blitz Games Global
18Shaman’s DreamEyecon
19Gates of Olympus 1000  Pragmatic Play
20Fire and Roses JokerGames Global

New UK slots

More than 50 new UK slots are being released every month, and here at, we review all the new releases from the most popular game studios.

In each review, you find info about the game, its features, max win potential, and guidance on where to play the highest RTP version.

UK slot sites approved by the UKGC


The essential requirement for slot sites to legally offer their services to customers from the UK is first to be approved by the United Kingdom Gambling Commission (UKGC).

This process is lengthy, costly, and time-consuming as UKGC requires online casinos to provide them with an extensive number of documents that show that the company applying for a UK license is worthy of it by following all the regulations and laws that come with it.

As a consumer from the UK, you are better protected when playing in UKGC-approved casinos, as these operators have many strict obligations to help you avoid being affected by harmful gambling activities.

As we all know, playing slots can be an entertaining hobby, but unfortunately, as with any gambling activity, it can sometimes affect you negatively.

You might play for more money than you can afford to lose or spend too much time playing casino games.

To prevent this, these UKGC-approved casinos are obliged to monitor their customers’ activity and interfere if any signs of harmful activity appear.

Any slots that might seem “childish” or have elements indicating that direction are prohibited in the UK market, together with bonus buy slots that aren’t allowed either.

The UKGC has excluded the bonus buy (feature buy) options as they deem these to be harmful and lure players into betting for more than they originally intended to do.

Best slot providers for the UK market

Online casino slots in the UK have grown in popularity in recent years, and not only have the UK slot sites increased, but also the number of slot providers delivering new games for the UK market.

These game studios have grown from a handful to an extensive number, and to be able to offer slots to UK players, they also need to apply for and be granted a UKGC license.

All these slots are tested and approved by licensed third-party companies before being offered to the public.

The most popular game studios in the UK & some of their most famous slots include:

  • Pragmatic Play: Big Bass Bonanza, Gates of Olympus, Great Rhino Megaways
  • Big Time Gaming: Bonanza, Danger! High Voltage, Who Wants to be a Millionaire
  • Games Global: Gold Blitz, Mega Moolah, Immortal Romance
  • Blueprint Gaming: Buffalo Rising Megaways, Ted Megaways, Napoleon 2
  • Push Gaming: Jammin Jars, Boss Bear, Razor Shark
  • Play’n GO: Book of Dead, Legacy of Dead, Rise of Olympus
  • Hacksaw Gaming: Densho, The Bowery Boys, Eye of the Panda
  • Nolimit City: Mental, San Quentin xWays, Nine to Five
  • NetEnt: Starburst, Twin Spin, Guns N’Roses
  • ELK Studios: Cygnus 4, Dead Man’s Gold, Pirots
  • Thunderkick: Hot Potato, Hellapenos, Rex the Hunt
  • AvatarUX: CherryPop, Pop Rocks, Raging Pop
  • Yggddrasil: Casino Zeppelin, Penguin City, Hyper Burst
  • Relax Gaming: Money Train 2, Templar Tumble, Helio’s Fury
  • Red Tiger: London Tube, Egypt Megaways, Case Closed

The first online casino slots appeared in the UK in the late 1990s, and the progress of the old games compared to the latest ones is jaw-dropping.

Games studios today have completely different options and tools to work with when new and advanced technology is available.

However, some titles have been around long and have historically been popular among UK players.

These classic slots include:

Biggest UK jackpot slots 


Jackpot slots have always been popular among UK players as there is always the possibility of winning huge amounts with small bets. However, keep in mind that the chance is slim, to say the least.

Although the chances of winning a UK slot jackpot are minimal, someone has to win it at some point, which keeps these games popular.

Remember that the overall RTPs in these jackpot slots are low for regular payouts, as a big part of it is saved for the jackpots.

The most popular UK jackpot slots are:

UK Jackpot SlotBiggest Jackpot WonWinning Date
WowPot£35,930,227Dec 2023
Mega Moolah£18,750,0002022
Dream Drop£2,555,484Dec 2023

The Megaways mechanic is a groundbreaking innovation from the Australian-based game studio Big Time Gaming. 

The first Megaways slot, Dragon Born, was released in 2015, but the release of Bonanza Megaways took the industry by surprise and revolutionized how UK slots are played.

In Megaways slots, the ways to win vary from one spin to the next and can often reach a maximum of 117,649 ways. More often than not, an extra reel of symbols is used above the standard reels in Megaways slots, too.

After the initial success, Big Time Gaming decided to lease out the mechanic to other game studios through a licensing system. After that, we saw the market becoming over-saturated with Megaways slots.

The Megaways mechanic is still popular among UK players, though, and these are some of the most played ones:

Future of UK slots


There we have it: the best UK slot sites and the best UK slots per category. So what can we expect in the future?

In the UK, regulators and the UKGC will have a big say in how slots develop in this market. We have already seen them prohibit feature buys in slots, so as a UK player, you won’t have the option to buy Free Spins and other bonuses in slots.

UK slot sites have also forbidden some other popular slots with a childish theme or elements, as these games are not allowed in the UK market.

Will we see other regulations in the UK, like max betting limits or other restrictions? Only time will tell.

Apart from all this, we expect real money UK slots to continue developing as technology becomes even more advanced.

Frequently Asked Questions

Which slot sites in the UK pay out the most?

This depends on which Return To Player (RTP) version a casino offers their players since most UK slots are available in different payout configurations. guides you toward the best RTP option for each slot and game studio in the UK.

Which UK casino site is best for slots?

Rizk and LeoVegas are currently two of the best options for slots in the UK. Both casinos are considered among the safest. They are popular, regulated by the UKGC, and offer the highest RTP versions of most UK slots.

Do all casinos use the same RTP versions in the UK?

No. Most slots are released with various payout configurations by the game studios, and then it’s up to the UK slot sites to decide which version to offer its players. can guide you toward the best version of each UK slot exclusively.

Which slot in the UK has the highest RTP?

Book of 99 and Mega Joker offer the highest average RTP of all UK slots as they clock in at 99%, which is unusually high.

Where do I find the best RTP versions of UK slots? exclusively points you toward the best-paying versions of each UK slot in their slot reviews.

Which are the most popular UK slots?

The most popular UK slots are Big Bass Splash, Bass Bonanza, Book of Dead, Gold Blitz Extreme, Gold Blitz, Fluffy Favourites, and Starburst at the moment.