Best Slot Sites in the UK – Expert Reviews for 2021
Want to find out more about the best slot sites in the UK this year? Look no further! Our expert reviews will save you hours of trawling through the countless online casinos available to UK gamblers.
Why are we doing this?
Because we love this thrilling and fast-paced game. We want to make sure players have loads of fun while enjoying the biggest possible payouts. That means identifying the top casinos, gambling there, analysing the strong and weak points, and sharing the results here with extreme candor: the good, the bad, and the ugly.
Along the way, we hope to offer some tips for those who want to wring maximum pleasure from time spent playing online slots.
We’ll start by laying out the essential features each casino must implement to earn five stars from our notoriously demanding reviewers.
New Casino customers only. Opt in required. 1 x customer. Min buy in with £10. Casino tab only. Max £300 bonus. 40x wagering requirement. Max redeemable amount of £2,000. Bonus expires 7 days from issue. Eligibility rules, game, location, payment method and currency restrictions, stake contributions and terms and conditions apply.
Bonus opt-in required. Maximum of €5 per spin or €0.50 per bet line is allowed. Contribution to Wagering Requirements varies per game. You have a right to withdraw your cash deposit and any cash winnings from this deposit. Terms and Conditions apply.
First-time depositors only (18+ UK exc NI). Min Deposit: £10. Max Offer: 25 Free Spins [on a game of our choice]. Promo code: DELUXINO. Free Spins Winnings will be capped at £2.50 and credited as bonus funds. 40x wagering applies to bonus funds. Games Bonus winnings are capped at £100 + original bonus amount. Games bonus funds may only be used on selected games only. Unused Free Spins expire after 7 days. Wagering requirements vary by game. We reserve the right to deny bonuses based on abusive bonus activity across sites operated by the Company. Deposit balance is available for withdrawal at any time (UK only). General withdrawal restrictions & full T&Cs apply. Valid until further notice.
First-time depositors only (18+ UK exc NI). Min Deposit: £10. Max Offer: 25 Free Spins [on a game of our choice]. Promo code: SPINZAAR. Free Spins Winnings will be capped at £2.50 and credited as bonus funds. 40x wagering applies to bonus funds. Games Bonus winnings are capped at £100 + original bonus amount. Games bonus funds may only be used on selected games only. Unused Free Spins expire after 7 days. Wagering requirements vary by game. We reserve the right to deny bonuses based on abusive bonus activity across sites operated by the Company. Deposit balance is available for withdrawal at any time (UK only). General withdrawal restrictions & full T&Cs apply. Valid until further notice.
Full T&C apply. 18+, New players only.100% up to £200 FreePlay (FP). £20 min deposit, excluding deposits by Skrill or NETELLER. FP expires after 14 days and wins are capped at the amount of FreePlay received, except JP win. FP wins are credited as bonus. Bonus wins are capped at £500. To withdraw bonus & related wins, wager 30 x (bonus amount) within 90 days. Wagering req. vary by game. This offer may not be combined with any other offer. Deposit balance is available for withdrawal at any time.
To qualify for the Welcome Bonus, you must be a MansionCasino member, at least 18 years of age. The minimum single deposit to claim this bonus is $/£/€20. The Welcome Bonus (up to a maximum of $/£/€500) is a redeemable casino bonus. To redeem this bonus you will have to wager a minimum of 20 times your deposit and the bonus amount. Please note that bonus funds have betting restrictions in place as part of our efforts to combat bonus abuse. For details of the applicable betting limits and other rules that apply to all our promotions, please refer to our General Promotion Terms and Conditions.
New customers only. Opt-in required. 100% Match Bonus up to €/$250 on 1st deposit of €/$20+. 25% Match Bonus up to €/$250 on 2nd deposit. 50% Match Bonus up to €/$500 on 3rd deposit. 50x bonus wagering applies as do weighting requirements. Credit Card, Debit Card & PayPal deposits only. Irregular gameplay may invalidate your bonus. Terms Apply.
Funded player only (18+ UK Only – excluding players based in Northern Ireland). Rewards from level 1 and above. Max Offer: 15 Daily Free Spins and £100 monthly cashback [credited as games bonus]. Winnings from Free Spins are credited as bonus funds with 40x wagering. Free Spins are valid for 24 hours. We reserve the right to deny bonuses based on abusive bonus activity across sites operated by the Company. Bonus win cap: £100 + the initial bonus amount. Wagering requirements vary by game. Deposit balance is available for withdrawal at any time (UK only). General withdrawal restrictions & full T&Cs apply. Valid until further notice.
First-time depositors only (18+ UK exc NI). Min Deposit: £10. Max Offer: 25 Free Spins [on a game of our choice]. Promo code: VIVA. Free Spins Winnings will be capped at £2.50 and credited as bonus funds. 40x wagering applies to bonus funds. Games Bonus winnings are capped at £100 + original bonus amount. Games bonus funds may only be used on selected games only. Unused Free Spins expire after 7 days. Wagering requirements vary by game. We reserve the right to deny bonuses based on abusive bonus activity across sites operated by the Company. Deposit balance is available for withdrawal at any time (UK only). General withdrawal restrictions & full T&Cs apply. Valid until further notice.
You can qualify for rewards when you wager a min of £20 on Slots. Max free bet is £5 per week (1x wagering requirement) when you wager £100+ in a week. Bonuses / Spins valid for 7 days & are awarded on the channel you wagered most on. Free spins can be used on eligible games. Rewards credited by 12pm on Monday following the qualifying week. T&Cs apply.
The New Player Welcome Bonuses are only available to players who create an account and make their first deposit at Sloty. You may only claim one Welcome Offer (Welcome Package or Live Casino Bonus). Once you have claimed one, you will not be eligible for the other. To be eligible to claim the New Player Welcome Bonuses, players must deposit a minimum of $10 in one instance, for each bonus. The General Terms and Conditions of the Sloty website apply.
We believe that every online player deserves a safe and secure sports betting environment, and that is exactly what we aim to provide here at ahoygaming.com. We create unbiased and honest reviews of UK’s best betting sites so that you can easily find the top names in the industry. With no external interference, our ratings and reviews are made independently by our team of expert reviewers and gamblers. Additionally, all of the operators on our site are licenced and regulated by the UK Gambling Commission so they can be trusted that they offer a fair and safe platform. We accept compensation from the operators that advertise on our pages which may affect their positioning. Also, we regularly update this list in order to bring you the newest and best betting sites, however, we cannot review every operator on the market.
At AhoyGaming we evaluate gambling sites according to a fixed set of objective criteria. These criteria mirror our thinking about the most important facts and features of any casino or gambling site. We evaluate every site we encounter according to this strict list.
Our formal evaluation methodology ensures that gamblers can learn which sites are the most fun, the most trustworthy, and the most secure from our reviews. And it ensures that all of the reviews we publish are apples-to-apples comparisons. It’s a bit of rigor in a web ecosystem that frankly lacks rigor. Our approach lets us stand tall in the industry and face ourselves in the mirror in the morning.
Each website on our list represents one of the best slots sites on the internet. We have subjected each of them to our exacting six-point evaluation program:
Our first category refers to the visual and technical sides of the website and how players interact with it. An appealing design makes a site more effective at luring players in, while an effective organization plan makes playing simpler and more enjoyable.
The quality of the online casino experience depends on the ease of navigation of a slot website, plus the quality of the graphics, the smoothness of the gameplay, the alacrity of game loading times, and the personalisation and customisation options for players.
Another feature that affects the score: compatibility of the site and its games with multiple platforms, including mobile devices.
Among the most important factors is the variety of slot games at the website. We ensure that each casino that makes our list has a varied selection of slot offers, slot types, and slot themes.
Old-fashioned real-world slot machines were once limited to three reels. Online games can have five, seven, nine, and even 12 reels. This not only increases the number of paylines and the variety of winning combinations, but also comes with bonus rounds and hidden levels of play.
The best slot sites offer highly interactive 3D slots with fantastic graphics and sound effects that immerse players in the action and enhance the gambling experience. Some 3D games require a software download, while others can be played directly from a browser.
Finally, we look for progressive jackpot games. The exciting part of these slots is that the jackpot builds and builds over time, and the jackpot can be won from any designated slot machine. Whoever matches a specific payline wins the progressive jackpot.
The online slots bonus offered upon registration or the occasion of making a first deposit is quite often a decisive factor for players who are deciding whether or not to play at a particular site. It’s an important element of our review rubric as well.
A welcome bonus for new players can be a deposit bonus, free spins, or a combination of both.
Newcomers need to know how to get the best out of these extras. For example, some sites offer matching bonuses of various values for the first three or more deposits. You can use the free money to take higher risks in your betting – and maybe score bigger wins.
Then there are the free spins you get just for registering. Possible limits include using the slot bonus spins only on specific slots, a maximum stake, or bonus expiration times.
Wagering requirements are conditions you must meet before withdrawing bonus funds. Every online gambling site has wagering requirements, and it is here – more than in bonus matching amounts – that sites most differ.
Let’s say you received a welcome bonus from one of the best slot sites listed in this review. The bonus is worth £10 and it has a 30x wagering requirement.
What does wagered 30 times mean? It means that the casino requires you to wager that £10 bonus 30 times – or place £300 worth of bets – before you can withdraw the money or any money that you won by wagering it.
Some wagering requirements have limits. For example, a site might require that you finish meeting the wagering requirements within 30 days or forfeit the bonus funds. Every slot bonus really ought to have its own page on the site’s policies page.
Players should focus on finding the smallest wagering requirement they can clear over the longest period of time.
Online payments have evolved tremendously. For those reasons, the best gambling houses offer a variety of payment options to meet the player’s payment preferences. Options for making deposits include debit cards, credit cards, e-wallets, bank transfers, pay-by-phone, and cryptocurrency.
At most sites, withdrawals can generally be made via the same channels. We take special care when evaluating withdrawal options because some sites make withdrawing your own money a complicated, slow process. At the best online slots sites, withdrawals are easy and fast.
When we think of banking, we naturally think of safety and security measures taken to keep our funds and our bank accounts safe. All of the sites we list here are regulated, which means government agencies periodically review security measures and technologies to ensure customer interests are protected.
Plenty of people like to play slots, and naturally enough, some of them encounter problems or have questions. That’s why our final evaluation criterion is reserved for customer support.
The best slot sites in the UK employ dedicated, reliable staff members to help players and answer their questions. We pay particular attention to the variety of customer support channels available – email, phone, chat, fax, and so on. We measure response times. We assess whether customer service agents are polite and whether they are sufficiently knowledgeable to help players with all the questions that might arise.
In addition, an easy to understand Help or FAQ page earns a site point. We are always sure to report details such as hours of operation, the presence or absence of toll-free telephone numbers, and so on.
The 5 Best Online Slots in the UK – All Top Slot Casinos for 2021
Mansion Casino (Best Customer Service)
Betway (Best Payout Online Casino)
Casumo (Best Slot Game Variety)
Paddy Power (Best No Wagering Slot Bonus)
Sloty (Best Welcome Bonus and Free Spins for UK Players)
William Hill was founded by bookmaker William Hill in 1934. Hill took bets via mail and telephone. William Hill’s online casino has been operating since 2000, and today it is one of the most widely recognised betting brands and UK slot sites around the world. The William Hill Sportsbook app passed a staggering two million downloads in 2018.
The William Hill platform is visually appealing. Both the website and the mobile app load quickly. Rules about the welcome bonus, wagering requirements, and bonus clearance time frame are clear and easy to understand. Although the site is still devoted primarily to bookmaking, it offers a solid catalogue of more than 700 slot games.
William Hill runs a lot of promotions. During our review period, the page of bonuses listed 16 active promotions, including two for new players. However, 15 of the 16 promotions are related to sports betting. The welcome bonus for UK players is a slots bonus of 10 free 10p spins on the William Hill Megaways slot.
All 10 spins must be used within 24 hours, otherwise they are forfeited along with any winnings you have earned with free spins. Funds you win through this promotion can be withdrawn immediately after the tenth spin as cash or wagered on the site in any way you like – there is no wagering requirement.
William Hill accepts debit cards, credit cards, and e-wallets like PayPal, Skrill, Neteller, WebMoney, Yandex.Money, QIWI, and ecoPayz. Credit cards and some e-wallet options are not available for UK slot sites customers due to the regulations of the UK Gambling Commission.
As for customer support, you’ll find a comprehensive Help and FAQs page. The Contact Us page lists chat, email, and phone as support channels. A notice on the site says that due to the coronavirus pandemic, the support staff is currently unable to provide phone support.
Casumo is an award-winning online casino founded in 2012. Among its recent awards is the International Gaming Awards Best Online Casino Operator trophy for 2019.
The design is modern and appealing, and the website is fast and easy to navigate. Players can find updates on the latest game releases and betting news in the casino’s blog. Amazingly, there are more than 2,000 slots and games available. Casumo picks the games from the best game developers and launches new ones every week.
New players receive 30 free spins on the Book of Dead slot game. In addition, they get a 100% match bonus up to £300 on their first deposit. The deposit bonus must be wagered 30 times before funds can be withdrawn.
Slot players can deposit money using Visa, Mastercard, Skrill, Neteller, Paysafecard, MuchBetter, or mobile billing.
Casumo maintains a nice and straightforward FAQ page with all the information users might need. Also, players can ask for assistance by emailing customer-support services or through Casumo’s live chat.
777 Casino is part of Gibraltar’s 888 UK Ltd, whose online slots and gaming operations are licensed by the UK Gambling Commission. Players from the UK, Germany, Austria, Canada, and Ireland can play freely on the platform.
The website is fantastically appealing to anyone who enjoys a vintage design mimicking retro Vegas casinos. Performance wasn’t quite as thrilling: The website felt a bit laggy when we were scrolling through the slots.
The casino offers more than 800 virtual slot machines. Players can explore the games using a handy filter option and select Jackpots, Classic Slots, Low Volatility, High Volatility, or In-House slots.
The online slots bonus for new players consists of a matching bonus of 100% of your first deposit up to £200. New players can also claim 77 free spins by responding to a verification email within 48 hours. That’s the good news. The bad news: This online casino has a 50x wagering requirement for withdrawing bonus funds.
Additionally, players new to 777 should note a couple of things when it comes to deposits and withdrawals.
Deposit channels that can also receive withdrawals include Visa, Mastercard, ecoPayz, iDebit, MuchBetter, Neteller, PayPal, QIWI Wallet, Rapid Transfer, Skrill, Trustly, WebMoney, Interac e-Transfer, and wire transfer.
Deposit methods that can’t receive withdrawals are Apple Pay, AstroPay Card, Bitcoin by Skrill, Instadebit, Instant Payments by Citadel, Interac Online, QR Code, Nordea, online bank transfer, Op-Pohjola, Oxxo, Paysafecard, PurplePay, Sofort, Todito Cash, Transferencia Bancaria, Boleto Bancario, Verkkopankki, and Yandex.Money.
The FAQ and Support pages of this slot website are a bit confusing. Some parts contain large blocks of text that, in our opinion, should be organised better so users can find information more easily.
If you can’t find what you’re looking for in the online guides, you can reach out to 777 customer-support agents any time via email or telephone.
Mansion Casino is a part of the Mansion Group Ltd, which has been part of the online gambling world for more than 15 years. This casino won the 2020 best customer service and the 2018 online casino operator of the year titles at the International Gaming Awards. Capital Finance International named Mansion the world’s most responsible online gambling operator in 2018.
As one of the top UK slot sites, Mansion guarantees a fair and secure environment. The casino is licensed and regulated by the UK Gambling Commission and Gibraltar Gambling Commissioner.
You’ll enjoy a smooth and sleek experience when you visit the Mansion website. Unlike many other slots platforms, Mansion has adopted a basic visual design – and we can’t complain. What the site lacks in razzle-dazzle it makes up in sheer speed.
The online slots section has 90 games with enough different styles and themes to provide plenty of variety for players.
You can play on the website or you can download Mansion Casino software to play slots and games on your Windows computer. The website version is the only option for macOS, iOS, and Android users.
New users are eligible for the “Double Your Money Welcome Bonus,” a 100% matching bonus up to £200. If your first deposit is greater than £1,000, Mansion adds 50% more up to £5,000.
For example, if you deposit £2,000, Mansion will add £3,000 more to your account.
You can’t withdraw any of the bonus funds until you have fulfilled a 40x wagering requirement.
Like all the best slots sites, Mansion Casino accepts several banking options:
Bank transfers: Przelewy24, Sofort, Moneta
Debit cards: Visa Electron, Mastercard Maestro
Instant Banking: UseMyBank, Sofort
E-Wallet: Skrill, Neteller, WebMoney, ecoPayz, InstaDebit, My Citadel, PayPal
Prepaid Card: Paysafecard
Boku Pay by Phone Bill: available only with UK phones, this option is good for making deposits but not withdrawals
The help and FAQ pages are well-organised and easy to understand. If they don’t answer all your questions, you can contact Mansion’s member services team via email.
Founded in 2006, Betway Group is a globally recognised provider of online slots and entertainment platforms. Betway Casino is part of Betway.com, which is primarily devoted to sports betting.
Although Betway is largely a bookmaking operation, it is well known for its slots. In 2015 Betway Casino entered history – and earned a spot in the Guinness Book of World Records – when it paid out a Meta Moolah slots jackpot of €17,879,645. The record makes Betway one of the best payout online casino UK operators.
Betway’s design lives up to the site’s reputation. The site and its games load quickly, and the minimalist but effective visual design promotes focused gameplay. Betway provides more than 450 games. Some of the best slots to play include branded games based on television shows like the Game of Thrones and Narcos. And don’t forget the progressive jackpot Mega Moolah. Lightning could strike twice.
Welcome Bonuses differ depending on the gambler’s locale. New UK customers get a 100% match bonus up to £250 on their first deposit of £20 or more.
Users from the rest of the world are eligible for a 100% match bonus up to €250 on their first deposit of €20 or more, a 25% match bonus up to €250 on the second deposit, and a 50% match bonus up to €500 on the third deposit.
Betway has a 50x wagering requirement. This means that if you are granted a slot bonus of £20, you would need to wager £1,000 (50 x £20) before the bonus or winnings can be withdrawn from your account.
Due to the UK Gambling Commission ban on the use of credit cards for online gambling, players from the UK can use only debit cards, PayPal, and bank transfer to deposit money at Betway.
Customers from the rest of the world can use credit cards for making deposits if they prefer.
Like all the best slot sites, Betway has a great FAQ and support page that is easy to navigate and use. Customer-support staff members are available via live chat 24/7.
This online casino is part of Mansion Group Ltd. The site is regulated by the UK Gambling Commission.
The Casino.com website is easy to use. A simple click on the download button leads to the installation of casino software for your Windows PC. In addition to the desktop application, there is also a slot casino app for Android and iOS mobile devices. You can download them at no charge from the App Store or Google Play.
The downloads are optional, however. You can access all the games and features at Casino.com through your browser. It works great on desktops, laptops, tablets, and phones.
The Casino.com platform has more than 200 games with 112 slots featuring different sports, TV and movie themes, and progressive jackpots.
The welcome bonus is a 100% match up to £400 for new online slots customers – plus 200 spins. Out of the 200 free spins, you get 20 spins for selected slots immediately upon registration.
You can use the remaining 180 spins at the rate of 20 per day after making a first deposit of at least £20.
Funds from the matching bonus are subject to a 40x wagering requirement, while any winnings you get from the free spins must fulfil a 20x wagering requirement before withdrawal.
Paddy Power was founded in 1988 by three Irish bookmakers who are clearly focused on entertaining their customers. With unusual and mischievous bets like who is the next Pope going to be or pretending to chop down the Amazon rainforest for the World Cup, they are certainly living up to their reputation.
Today the company is a part of international sports betting and gaming operator Flutter Entertainment PLC. Slots UK customers will be glad to know that Paddy Power is licensed and regulated by the UK Gambling Commission.
The website is fast, and it has a recognisable dark-green poker-table background. When you first get to the website, the content might seem a bit overwhelming at first. Be persistent. Poke around a little and you will discover that you can easily make your way around the website and find the games and slots you seek. The slots catalogue at this popular site includes more than 500 games.
A Paddy Power app is available for Android and iOS devices. If you’d prefer to access the desktop version of the site from your phone, just use Chrome – it works great.
New online slots customers get 50 free spins on games in the Paddy Power Daily Jackpots slots collection. Once you claim the free spins, you can win 100 more by signing up, depositing £10 or more, and betting it on any game from the Daily Jackpots collection.
This welcome package is available to customers registered in the UK or Ireland. The free spins must be used within seven days.
Probably the most important piece of information is that there are no wagering requirements on the free spins. Whatever you win is yours to keep immediately.
As one of the best online slots UK operators, Paddy Power has numerous baking options:
E-wallets: Neteller, PayPal, Skrill, Moneybookers
PPlus cash card
The Help and Support part of the website is organised into sections, making it easy for visitors to find answers to their queries. Of course, you can always message the customer support team from your Paddy Power account to get the quickest answer.
Founded in 2017, Sloty is one of the new slot sites in the online gaming industry. However, it is quickly building a reputation as a reliable brand. The company is owned and operated by the Genesis Global Limited Casinos group. It’s licenced by the Malta Gaming Authority and the UK Gambling Commission.
Remarkably, it’s available in six languages and supports more than 20 currencies.
Sloty was developed as a mobile-first service backed by powerful technology complemented with modern, user-friendly design. The casino has more than 250 slots. All the slots and games are created by leading gaming studios.
The welcome bonus is one of the most generous we have seen. New players are eligible for a welcome bonus of up to $1,500 and 300 free spins!
When you make your first deposit, you get a 100% match bonus up to $300. The second deposit gets you a 50% match up to $400. The third and fourth are 25% matches with a maximum slots bonus of $400 each.
You get 30 free spins immediately after making your first deposit. The remaining 270 are doled out gradually: 30 spins per day for the next nine days. The spins are good only on particular slots.
All bonuses are subject to a 40x wagering requirement before bonus funds or winnings can be withdrawn.
Banking options at this all slots casino: Deposits can be made using debit cards, credit cards (outside the UK), Paysafecard, and the e-wallets Skrill, Neteller, ecoPayz, and MuchBetter.
Withdrawals are much the same except that you can withdraw funds via online bank transfer and you can’t withdraw funds to Mastercard debit cards.
Sloty’s customer service is first-rate. If you can’t find the information you’re looking for in the neatly organized FAQs, you can contact the customer-service staff by phone or email.
What is the best online slot site?
This depends solely on your personal preferences. One thing is certain and that is that all the best slot sites we review provide top services and offers to slot players.
Which online slots payout the most?
Progressive jackpot slots like Mega Moolah and Mega Fortune hold the record for the biggest progressive jackpot slot wins and payouts.
What is the most popular slot machine?
The progressive jackpot game Mega Moolah seems to be getting the most attention from players across the world. It’s a five-reel slot with 25 pay lines, and the jackpot amount, which often exceeds €1 million, makes it one of the best slots to play.
Do online slots really pay?
Yes, they do. The amount depends on factors that differ from casino to casino.
Can you win big on online slots?
Jackpots, especially progressive jackpots, can represent climb to life-changing heights. At many sites, the Mega Moolah progressive jackpot quite often climbs higher than €1 million.
What are the odds of winning on online slots?
The odds are directly connected with the type of slots you’re playing and the number of pay lines or winning combinations. You’ll win more often if you play more lines on slots with more reels.
Is there a way to tell if a slot machine is going to hit?
No. The best you can do is to check the slot’s Return To Player rate, which is the percentage of the initial stakes a player can expect to receive as winnings over a large number of spins. For instance, a player who makes 100 £1 bets on a slot with a 92% RTP can reasonably expect to end the session with £92.