In certain instances, we may earn revenue when a reader makes a purchase or completes a form through our pages or on a partner’s website. We adhere to a strict The best online slots in the UK strive to keep you entertained with exciting themes and features. You’ll also find higher levels of fairness, thanks to excellent payout percentages.
To find top-rated games at the best slot sites in the UK, you’ll need to know what to look for. We’ll explain everything you need to know and provide the best sites to play for real money in 2025.
- Show Full Guide
Best Slots Sites in the UK
The best slot sites in the UK offer games from multiple leading providers. This ensures you have access to hundreds and sometimes thousands of popular online slots with new releases added often.
The slot sites featured below provide the best overall package for all your spinning and winning requirements. You’ll find everything from high paying slots through to new online slots that recently launched in the UK:
Casumo Casino |
Live Betting and Live Casino with UK License |
Live Betting and Live Casino with UK License
|
Casumo Casino
|
Play Now |
Paddypower Casino |
Get 100 Free Spins in Welcome Offer |
Get 100 Free Spins in Welcome Offer
|
Paddypower Casino
|
Play Now |
- Show Full Guide
Top 10 Slots in the UK for 2025
The top 10 best slots in the UK present the best balance between rewards and entertainment. These UK slots stand out among the rest for their innovative features and high payouts and come from the world’s biggest game providers.
| Slot Name | Year Launched | Game Provider | RTP |
| 1. Gonzo’s Quest | 2011 | NetEnt | 95.97% |
| 2. Big Bass Bonanza | 2020 | Pragmatic Play | 96.71% |
| 3. Starburst | 2012 | NetEnt | 96.09% |
| 4. Thunderstruck 2 | 2010 | Microgaming | 96.65% |
| 5. Game of Thrones | 2014 | Microgaming | 94.86% |
| 6. Aloha Cluster Pays | 2016 | NetEnt | 96.42% |
| 7. The Dog House Megaways | 2019 | Pragmatic Play | 95.51% |
| 8. Mega Moolah Megaways | 2023 | Microgaming | 88.12% |
| 9. Lock and Pop | 2024 | NetEnt | 96.09% |
| 10. Dazzle Me Megaways | 2021 | NetEnt | 96.10% |
Top 5 Best Online Slots Reviewed
Our top 10 slots in the UK list includes all the most popular games. However, if you’re looking for the ones that really impressed us the most at UK online casinos, check out the following top 5 best online slots.
For over a decade, the following five UK slots have remained the most popular, and we’d like to tell you why.
1. Gonzo’s Quest – First UK Slot with Avalanche Reels
NetEnt has produced many of the best UK slots, and Gonzo’s Quest remains among the top. Thanks to innovative features and being one of the first 3D animation slots, it became an overnight success.
My first experience with the unique avalanche reels was filled with excitement, especially as symbols activate payouts, explode, and allow new symbols to drop down and trigger even more rewards.
Combined with free spins and progressing multipliers, it’s easy to see why it remains one of the best slots to play online for real money in the UK.
“The slot has an interesting scoring system that is similar to Tetris. Similar cells self-destruct and make room for new ones. This allows you to increase the winnings 5 times. The graphics in the slot are excellent. The main character is active during the game, and this adds dynamics.”
2. Big Bass Bonanza – Top-rated Winning Slot in the UK
Big Bass Bonanza is one of the most well-known slots in Britain, offering a straightforward ten-payline over five-reel layout and a range of special features. With fewer paylines, it’s easy to wager less and still access all the features. Of course, higher bets are easily accessible, and high rollers can stack up to 10 coins per line for multiplied payouts.
During free spins, special money symbols have random multipliers of up to 2,000x the total bet per spin.
The return to player (RTP) percentage is well above the industry standard of 96%, making Big Bass Bonanza an excellent choice for those seeking the best winning slots in the UK.
“What I enjoy about the Big Bass games is the fact that when you get a fisherman symbol and fishes in the same spin, the fisherman will collect all values from the fishes. And if you end up getting a fisherman but no fishes, you might get a Bazooka feature where random symbols are turned into cash fish symbols.”
3. Starburst – Most Famous Real Money Slot in the UK
Starburst is one of the best UK slot games because of its layout and rewarding base game features. Remarkably, the game doesn’t include any special features, such as free spins or a bonus round, and it represents a classic slot more than anything else.
All NetEnt online slots come with a special feature that’s not available in any other game. At the time of launching, Starburst was the first to provide expanding sticky wilds with re-spins.
The feature triggered easily and quite often, leading to impressive payouts as wilds expanded and triggered a re-spin. Needless to say, I managed to trigger some impressive winnings, especially when wilds landed on each of the middle reels.
The well-known real-money slot also provides payouts in both directions, making more combinations possible. Its low volatility ensures regular wins, which is why Starburst remains popular with free spins casino bonuses as well.
“Gets a bad rap. Probably for the simplicity and monotony. But I just love this slot. Regular payouts keep you interested and whilst major wins are harder to come by, they are still there and what a buzz. Probably my favourite slot tbh.”
4. Thunderstruck 2 – First Slot in the UK with 243 Ways to Win
Thunderstruck 2 was the first online slot to provide 243 ways to win, making it possible to activate combinations in endless ways from the leftmost reel. Today, hundreds of other UK online slots use the mechanics, but few can compete with the original.
Once I triggered each of the four free spins features, I discovered loads of other brilliant rewards, including multipliers, special wild symbols, symbol transformations, and rolling reels.
You can read more about the massive free spin features and how they activate in our Thunderstruck 2 slot review.
“Thunderstruck II, is an enhanced version of the original featuring 5 reels and 243 Ways to Win by Microgaming. This detailed sequel of Norse mythology offers much more than its predecessor with Dynamic gameplay and High potential via 4 different and innovative Bonus events, the chance to win up to 2 Million coins!”
5. Game of Thrones – Most Famous Branded Slot Online
The Game of Thrones slot was released during the eight seasons of the well-known HBO series. Microgaming took on the task of creating the world-famous slot and filled it with four unique free spin features, each representing the most famous houses from the series.
Unlocking all the free spins features take some time, but higher payouts activate with each as Baratheon, Lannister, Stark, and Targaryen high-paying symbols make an appearance.
While the RTP is lower compared to other famous UK slots online, the medium volatility and range of remarkable features keep it in the top five best slots for real money in the UK.
“A slot from Microgaming and based on the great Game of Thrones TV series. As a fan of the series, I was really glad when Microgaming was able to get the rights for this slot and for it to be made. All of the main ones are here: House Targaryen, Lannister (Lannisters always pay their debts, and maybe they will help you pay off some of yours if you have any with the wins you get from this slot), Stark, and Baratheon.”
Best New Online Slots in the UK for Real Money in March 2025
Playing new online slots in the UK gives you the advantage of discovering more top-rated games first. Game providers such as Pragmatic Play release new slots online almost weekly, adding new themes, features, and more ways to score big wins.
Play new online slots in the UK for free without downloading software or registering an account.
Play Free Slots in the UK
You can play over 20,000 free slots with no download or registration. These free slots are the real money version that you can test without spending any money.
It’s the most recommended way to find the best UK slots to play, especially since the features, betting options, and fairness levels are identical.
You can apply various filters on our free slots page, making it easy to find the best slots to play online. Filter through our free slots by choosing your desired theme, features, slot type, providers, and more.
How to Play the Best Slot Games for Free
To play real-money slots for free in the UK, use your PC or mobile device and visit our free slots page. You can either search for your favourites or use our filters to discover the latest releases.
You don’t need any software or accounts to play free demo slots, making it easy to test games without using real money. We highly recommend trying these popular titles:
Biggest Progressive Jackpot Slots in Britain
Thanks to leading jackpot game providers such as NetEnt and Microgaming (Games Global), slot players in Britain have access to the biggest progressive jackpots in the world.
Some of the biggest progressive slot winners come from Britain, so don’t hesitate to try some of these life-changing games when you’re feeling lucky.
| Jackpot Slot | Provider | Minimum Jackpot | Average Payout |
| 1. Mega Moolah Megaways | Microgaming | £1,000,000 | £5,500,000 |
| 2. Mega Fortune | NetEnt | £150,000 | £4,000,000 |
| 3. Jackpot Giant | Playtech | £100,000 | £5,000,000 |
| 4. Age of the Gods | Playtech | £100,000 | £5,500,000 |
| 5. Aztec Millions | RealTime Gaming | £1,000,000 | £2,000,000 |
Types of Online Slots for Real Money in the UK
Knowing the different types of the best UK slots online makes it easy to identify the benefits and what to expect. While game providers have created various game styles, most online slots in the UK fall under these five categories.
Three-Reel Classics
Classic online slots are the most basic and strive to reward with combinations instead of additional features. While some classics can have five reels, the most popular classic slots online in the UK have only three reels.
Since classic slots only have up to 10 paylines, total bets are lower while winnings remain high. However, higher volatility could result in multiple spins that don’t return any winnings.
Before you play these slots for real money, try the most popular UK classic slots for free and read our reviews.
Video Slots
The term video slot comes from the first digital machine that used a display instead of mechanical reels. Therefore, all online slots technically fall under this category. Today, UK slot sites use this category to represent modern slot games.
Most video slots provide five reels, various paylines, and the popular 243 ways to win mechanics. These online slots will have wild symbols, multipliers, free spins, and other bonuses.
Play the most popular UK video slots online for free, and read our reviews for more details on how these games work.
Progressive Jackpot Slots
Anyone seeking the highest-paying UK slot games should play progressive jackpot slots. Some of these jackpot slots can provide winnings of well over a million pounds in a single spin.
Progressive jackpot slots are available in various game styles and mechanics, including classics, video slots, megaways, etc. UK online casinos not on GamStop have become popular with jackpot slots as they do not apply the same betting and time limits.
Progressive jackpot slots are also available in demo mode, allowing you to familiarise yourself with the betting options and features and activate the jackpot. However, you’ll need to play these online slots for real money to win the jackpot.
Megaways Slots
Big Time Gaming first introduced the megaways mechanics in 2015. These mechanics allow combinations to be activated in any direction as long as symbols appear consecutively from the leftmost reel.
Most megaways online slots provide well over a hundred thousand ways to win, enabling massive combinations to activate. You’ll also find a generous range of special features, from free spins to multipliers and cascading reels.
If you’re new to megaways, playing the demo slots below is highly recommended before playing these online slots for real money in the UK. While these slots are easy to play, it could take some getting used to the way combinations activate and the actions that follow.
Bonus Buy
The bonus buy option is available on multiple UK slots online and allows you to purchase the main bonus feature instantly. Depending on the slot, the bonus buy fee ranges from as little as 25x to 300x your current bet per spin.
While special features are highly rewarding and might tempt you to purchase the main feature over and over again, be careful. There’s no guarantee that the feature will pay more than the bonus buy cost, which means you might end up losing.
Try these bonus buy slot demos to see how it works, the payouts, and how much the feature would cost based on your preferred wager.
This Week’s Best Online Slot in the UK
Looking for interesting online slots to play at UK online casinos? While reviewing the most popular and newest online slots, we discover games that stand out above the rest with incredible features, winning opportunities, and more.
Mine Blown by NetEnt – A Bonus-Filled Gold Mining Experience
Once again, NetEnt manages to deliver the most impressive gaming experience with its new Mine Blown online slot. Take advantage of random wilds, free spins, sticky wild re-spins, and much more as you dig deep to find the biggest golden nugget.
We were most impressed by the bonus buy options, which include both regular free spins (25x your wager) and the unique bonus re-spins (50x your wager).
While free spins might seem quite standard at first, as soon as those lucky wild nuggets appear, they will lock in place and represent any other symbols, other than the scatters and bonus symbols, of course.
The bonus re-spins feature is the true hero of the game, and you can try it for free in our Mine Blown slot free demo. You’ll travel down to the deepest part of the mine, where you’ll receive three re-spins, during which rocks, golden nuggets, and other gems appear on the reels. The cart below the reels will collect all the gold, and the gems will activate additional re-spins.
Best Bonus Features in Top Online Slots in the UK
Bonus features in UK online slots are usually the highlight of the game. These can provide a wide range of special features that we haven’t seen before.
NetEnt and Pragmatic Play are the best game developers for innovative features. Each of NetEnt’s new releases include an industry-first feature.
Below, we’ll explain the five most popular features available in top slot games in the UK. Understanding what the features do and how they work will make it easier to choose the best slots in the UK for real money.
Free Spins
Free spins are available in most video slots, megaways, and even progressive jackpot slots. It’s usually the most rewarding feature, and game providers love to enhance it with multipliers.
- How free spins work: As the name suggests, free spins spin the reels to activate winnings without using your account balance. While some games don’t combine any additional benefits, the best slots online add multipliers, special wilds, sticky symbols, and more to enhance the free spins feature.
Multipliers
Multipliers can form part of just about any other bonus feature, and some providers like to include them with avalenache reels as seen in Gonzo’s Quest by NetEnt.
- How multipliers work: Multipliers are straightforward; once activated, they will multiply your payout by the number stated. For example, free spins with a 3x multiplier will triple all the payouts activated during the feature. A wild symbol with a 5x multiplier will multiply the payout by five when the symbol forms part of the combination.
Hold and Win
The hold and win feature commonly replaces free spins with special re-spins that use a unique set of reels. Some game providers would also use hold and win as the jackpot feature, rewarding one of the progressive jackpots when you collect enough symbols.
- How Hold and Win works: The feature is usually played on a unique set of reels that only have one symbol. When this symbol appears, it will lock in place as the remaining reels spin again. The feature continues as long as more symbols land and get locked. The more you get, the higher your payout will be.
Cascading/Avalanche Reels
Game providers have unique terms for cascading reels, but all refer to the same feature. Multiple online slots in the UK use the feature as you can trigger multiple combinations in a single spin. Additional benefits, such as multipliers, are also common.
- How cascading reels work: Once a winning combination activates and pays, the combination is removed from the reels and replaced by symbols dropping down. This could lead to additional combinations. The feature will repeat for as long as winning combinations activate consecutively.
Cluster Pays Online Slots
Cluster pays is a unique concept first introduced by NetEnt in 2016. Instead of paylines, cluster pays slots activate rewards when enough symbols appear in a cluster anywhere on the reels.
The reel set is typically bigger and square, allowing more symbols to appear in each spin, increasing your chances of activating a combination. Symbols appear in massive stacks, which could lead to massive payouts by filling up the reels with a single symbol.
These UK online slots have features such as free spins, multipliers, and wild symbols. Play the demo slots below to see how they work before playing cluster pays online slots for real money.
Slot Payouts and RTP – What Do They Mean?
The return to player (RTP) percentage is the theoretical payout you can expect over time. The percentage shown in online slots is the average, calculated over thousands of spins. So, what does it mean?
Theoretically, the RTP presents the return you can expect over time from a specific slot. For example, an RTP of 96% indicates a return of £96 for every £100 wagered. However, it’s not quite that straightforward.
While playing online slots for real money, the RTP constantly changes; sometimes, the RTP is in your favour (over 100%), while other times, it’s in the casino’s favour (under 100%). There’s no way of knowing the current RTP, but if you’re on a winning streak, chances are excellent that the RTP is currently in your favour, which could change at any time.
The Best Online Slots for Winning – High RTP Percentages
Since the stated RTP percentage is the average calculated over thousands of spins, choosing slots with an RTP of 94% or higher is vital to ensure better fairness. If you’re aiming to play the best online slots for winning in the UK, aim for RTPs of at least 96%.
High RTP online slots in the UK indicate that the payouts are often in your favour. However, this doesn’t guarantee winnings because the current percentage could be lower when you spin the reels, which is why online slots are games of chance.
Since the percentage is calculated over thousands of spins, there is no significant difference between 96% and 98% RTP. However, you’ll quickly see a difference in payouts when comparing online slots with an 85% and 96% RTP.
Top 5 Best Slots to Play Online – Highest RTP Online Slots in the UK
Play slots online for real money with high RTP percentages to ensure better fairness. However, that doesn’t mean you should avoid other slots, but be sure to choose games with an RTP of at least 95% and above. The best slots sites provide games from developers that aim for better fairness, offering a wide range of games with RTPs from 96% up to 99%.
| High RTP Slots | Payouts | RTP | Game Provider |
| 1. Mega Joker | 2,000x | 99% | NetEnt |
| 2. Blood Suckers | 1,014.6x | 98% | NetEnt |
| 3. Starmania | 1,000x | 97.87% | Nextgen Gaming |
| 4. White Rabit Megaways | 13,000x | 97.7% | Big Time Gaming |
| 5. Medusa Megaways | 50,000x | 97.63% | Nextgen Gaming |
How Volatility Affects Online Slots in the UK
Choosing online slots for real money in the UK based on volatility ensures you find games that match your winning requirements. There are three main volatility ranges, and while some slots fall between two categories, understanding the main ranges will make it easier to identify your favourites.
- High Volatility: Online slots with higher payouts but take longer to activate winnings. Online slots in the UK with higher payouts or very rewarding features would usually be high volatility.
- Medium Volatility: Most online slots fall in the medium volatility range, offering a balanced game experience between reward and how often payouts and special features trigger.
- Low Volatility: Low volatility slots would activate combinations often, but the rewards would be lower. Of course, these slots could deliver some big wins, but they would also activate payouts lower than the bet per spin.
Expert Tips to Find the Best Slot to Play Online for Real Money
Having a better understanding of the types of slots, features, RTP, and volatility, it’s bound to be easier to find the best slots to play online for real money that match your needs. Of course, there are thousands of real money slots in the UK, so use these three tips to assess games and see if they are worth playing.
1. Review the RTP and Volatility
The RTP and volatility of any real-money slot can be found on the pay table or game rules page. Alternatively, you can use slot reviews to find the information and read about the features available.
Some game providers strive to impress with the best winning slots in the UK. These high RTP slots can offer percentages well above 97%, giving you an advantage as the house edge is lower.
The industry standard RTP for online slots is 96%, much higher than slots at land-based casinos. Therefore, if you find real money slots with a slightly lower RTP, don’t hesitate to play it, but try to stay above the 94% mark.
2. Try Free Online Slots in the UK
Free online slots in the UK allow you to play the real-money version of the game as a demo. You can use the demo slot to test the betting options, see how it works, activate bonus features, and experience everything else the real-money game offers.
Free online slots provide an authentic gaming experience as these are the real money game, but uses “fun money” in the demo mode. Therefore, the RTP, volatility, and features are identical.
Finding new online slots in the UK is great for discovering new features and big wins, and playing it as a demo game first ensures you start playing for real money with an advantage.
3. Play Tournaments at UK Slot Sites
Whether it’s a skill or good old-fashioned luck that gets you to the top of the leaderboard, there’s nothing that competes with the adrenaline of slot tournaments at UK slot sites.
Slot tourneys are very popular in Great Britain, and online casinos ensure there are loads of game styles and prize pools to choose from. Complete the tasks to claim your way to the top to claim your share of the reward.
Slot tournaments are brilliant for all experience levels, and you can compete with any wager, especially those slot tournaments that allow you to collect points based on the number of spins and biggest multipliers. It doesn’t matter how much you wager as long as you play the most spins or claim the biggest win multiplier.
4. Start with the Best Game Providers
Game providers such as NetEnt, Pragmatic Play, and Microgaming remain among the best for their high levels of fairness, innovative game features, and incredible themes. Whether you’re new to online slots in the UK or trying to find the best slots to play for real money, starting with the best providers is a great way to gain an advantage.
While testing the best online slots from top providers, you’re bound to have your favourites. This makes it much easier to find suitable slot sites as not all casinos have the same providers.
“Each developer has their own way of creating slots, including the interface, the betting limits available, and the details of the pay tables. Therefore, choosing the same provider for real money slots would ensure you're already familiar with the interface, where to find game information, and the type of betting options available.”
Play the Best UK Slots with Casino Bonuses
Casinos with the best UK slots provide brilliant bonuses to increase your bankroll. While these bonuses are limited at regulated sites, independent UK casinos offer massive packages for the best chance to win real money slots.
Gaming sites provide various bonuses for various games, some of which might not be the best for online slots. Therefore, we recommend choosing one of the following slot bonuses.
Getting Started with Online Slots for Real Money
Finding the best slot games that pay real money gives you a significant advantage at any UK online slots site. However, it’s important to choose a site that has the right gaming software, promotions, and security measures for the best possible experience.
Some slot sites in the UK use sub-par gaming software with lower-than-usual RTPs, which you’d want to avoid. We recommend choosing a site with at least a few of the top 10 best online slots in the UK mentioned at the top of our guide.
Use the following three steps to easily compare UK slot sites and find the one that best matches your gaming needs.
Find a UK Slots Site with your Favourites
Independent UK online casinos provide a much more extensive game selection, making it likely to find multiple top-rated slots for real money. These UK slot sites feature over 50 game providers, including NetEnt, Microgaming, Pragmatic Play, and other leading developers.
Before signing up with a slot site in the UK, visit the games page and search for a few of your favourite slots online. Not all casinos have the same variety of games, so searching for the titles you’d like to play for real money will avoid disappointment after signing up.
Compare Slot Bonuses and Free Spins
Offshore online casinos in the UK offer a wide range of impressive bonuses. Find free spins, match offers, reload bonuses, and the most remarkable packages that include a bit of everything.
Visit the promotions page to view and compare bonuses for real money slots. You’ll find various offers for real slots, table games, and other gaming and betting categories. Compare the slots bonus, terms and conditions, and wagering requirements.
Choose Safe Real Money Slot Sites in the UK
International online casinos in the UK provide the best of both worlds, offering a highly secure gaming platform without GameStop’s limitations. These slot sites are fully licensed and adhere to strict rules and regulations, providing the highest fairness and security levels.
Offshore casinos have become the preferred way to play slots online for real money, thanks to higher limits, no timeouts, and giving you the freedom to play real slots online the way you’d like.
Responsible Gambling for Real Slots in the UK
Independent UK slot sites don’t have the same limits as casinos on GameStop, allowing you to take control play real money slots the way that suits you best. Of course, responsible gaming tools are available at these casinos, allowing you to apply your limits.
We highly recommend using the available tools to ensure you play responsibly and within your budget. There are various options, including betting limits, deposit limits, and self-excluding when you need a break.
Betting Limits
Under your account settings, you can apply limits to your in-game bets. This will ensure you never exceed a specific wager, which could lead to bigger losses. Apply a betting limit that suits your gaming style and budget.
Deposit Limits
A deposit limit makes it easier to avoid overspending or wagering money you can’t afford to lose. Use the betting limit responsible gambling tool to limit the amount you can deposit daily, weekly, or monthly.
Self-exclusion and Timeouts
If you’re finding it challenging to play responsibly and need to take a break, use the self-exclusion or timeout options. Based on the selected period, you won’t be able to access your account, make deposits, or play any real money online slots. It’s the best way to gain control if things get out of hand.
Payment Methods at the Best Slot Sites in the UK
Whether you play at an established casino or new slot sites in the UK, you must consider how you will deposit and withdraw funds. Below are five of the most common payment methods you can use to add money to your account and get access to your winnings.
How to Sign Up to the Best UK Online Casino for Slots
Signing up for a UK online slots site for real money is a simple process that can be done in a few minutes.
- Go to the casino site.
- Click the “Register” or “Sign Up” button.
- Fill out the registration form with the required info.
- Sign in using your new account and open the cashier.
- Make a first deposit using a supported payment method.
- Browse the online casino slots and start the ones you want to play.
The most attractive online slots have the biggest jackpots and special features. However, evaluating all aspects, including fairness and volatility, is essential. At Techopedia, our in-house review process examines each aspect, ensuring unbiased and detailed slot reviews you can trust. This Includes: …and more. Read more about the detailed steps for testing and reviewing slots at Techopedia.How We Test and Review Online Slots
150+ Gambling Platforms Reviewed
1,100+ Games Software Tested
200+ Monthly Hours of Research
375+ Gambling Promotions Verified
