by
Hannah Hendricks
Last updated: September 16, 2021

What Are Online Slots?

Slots are games where you spin the reels to form a winning line. A winning line is called a payline; you’ll need to land matching symbols on that line to get a prize. Online slots are an adaptation of the physical land-based casino slot machine or pub slot machines (sometimes called Fruit Machines or Fruities). Online slots can be enjoyed on a desktop device or your mobile or tablet.

As you can see, it’s a very simple idea, but the twist is that there are many different adaptions of that rule, especially with newer slots. There are countless different slot themes and many different gameplay features that add a contemporary twist playing online slots as opposed to playing land-based slot machines which are becoming a thing of the past.

How Do Online Slots Work?

To win at slots, the concept is the same as the slot machines you’ll find in land-based casino venues. You spin the reels to match the symbols on a winning payline. The fundamental difference between playing slots online is that the variation of games is far wider and are designed with many more attractive and exciting features. Features include more paylines, more reels, free spins features, avalanche reels (reels that fall and new ones appear in their place), gamble features and Max bet features. All of these modern features have one main purpose, and that is to increase your chances to land a winning combination!

Latest Online Slots September 2021

Keeping up with the latest slots can be hard because there are many released in the UK every week. We enjoy playing online slots and we add new slot reviews to our slots library regularly for you to use as an informational resource, to help you get a better understand of a specific game. Our slot reviews aim to highlight the theme of the game, but we go into much further detail than that, including often overlooked parts like the mechanics of a slot – RTP % Volatility and Max Wins.

It’s easy to get carried away when choosing new slots; we’ve all been there: we select a new game based on its name, appearance and theme, only to discover it’s not a well-suited slot for your playing style. Perhaps it’s a high variance slot that will eat up your bankroll too soon? Or perhaps there aren’t enough features to keep you entertained? These oversights are the sort of things our slot reviews aim to diminish so that you don’t end up wasting time playing naff slots. On this page, we’ve left no stone unturned as we explain everything you need to know about UK online slots!

Starburst Extreme
4/5
RTP:96.26
Rainbow Riches
4.5/5
RTP:95%
Mega Moolah
5/5
RTP:88.12% - 93.42%

What Makes A Good Online Slot?

Below, we’ve added some helpful tips so that you end up picking the right slot. In a nutshell, here’s what we think establishes a good slot from a mediocre one, and this is also what we recommend looking for when choosing one:

  • RTP & Volatility: Excellent slot games usually have medium to high RTP% (see below). The higher the RTP%, the better the payouts will be. On average, a good RTP % is around 96% and above. However, don’t dismiss slots with a lower one; perhaps there’s a reason! For example, the slot may offer a huge progressive jackpot which might make playing it worth it after all. What’s more, some slots do not have a fixed RTP % which means a slot’s RTP will increase the more you play.
  • In-Game Bonus Features: A decent online slot will have a good number of built-in bonus features to help you form a winning payline, as well as being entertaining to play. Popular UK slots offer exhilarating bonus features such as free spins, re-spins, multipliers, wilds, scatters, avalanche reels, expanding reels, colossal symbols, win both ways paylines, multiplier, slot machine feature, cascade reels, pick and click features, gamble features or 243+ ways to win (and so many more!) These make for exciting gameplay.
  • Exciting Theme: An interesting theme makes an exciting slot too. Popular themes include fun and cute cartoons like characters, Viking/ Norse themed, Magic and Mystical Themed, Space and Sci-Fi themed, Christmas, Halloween and Easter-themed. You name it, there’s often a themed slot for it. Take the legendary Book of Dead slot or other ancient Egypt themed slots like the Book of Ra. These are very popular in the UK. There’s also plenty of branded slots too, often based on a popular TV show, like Vikings Slot, Game of Thrones Slot, Baywatch slot – there’s so many different and it’s really fun to see your favourite TV character immortalised in an online slot machine!
  • Jackpots: For all of us, the aim of playing online slots is to gamble and win some money. This why checking a game out for its win potential will put you into the driving seat of a better payout. Who doesn’t love online slot games where you can hit a multi-million jackpot while having fun? Some jackpots, such as Divine Fortune, Mega Fortune and Mega Moolah are simply life-changing. We know that smaller jackpots might not appear as attractive, but remember that big jackpots don’t get snagged too often. So, make sure you mix it up and play a variety of jackpot slots.
  • Maximum & Minimum Bet Function: ‘Min and max’ bets are important to research. Slots that offer a max bet are the ones you want to look out for because many of the online jackpots can only be won with the max bet. What’s more, you usually get a higher payout percentage when betting max. (Though always check this in a game’s rules as it differs from game to game).
  • Mobile Slots: All slot vendors develop their games in HTML5 technology which means that a slot will be perfect in mobile format. Though, it’s always best to check (especially slightly older slots) that it’s available as a mobile slot.

Understanding What RTP % Means

There comes a time when every casino player asks “what does RTP % mean". The return to Player % is mentioned a few times in this article and throughout this website and is a pretty important detail to grasp. Return to Player (RTP) is a helpful percentage that shows the average amount won back from the slot by players. The higher the % is, the greater the chance of winning some funds back will be. Most slots have a fixed RTP that doesn’t change no matter how much you wager, but slots RTP can increase the more you play.

If you’re playing a slot that has a theoretical RTP of 96% and you play 100 spins at £1 per bet, then you can expect to win back £96 (on average). The remaining £4 is called the house edge, which is the money the casino makes. What’s important to understand about a slots RTP is that it represents the percentage of bets that a player can expect to win back over their entire time playing that game. It doesn’t mean that you are guaranteed to win that money back when you play your session of spins.

What’s more, each spin is calculated using very complicated Random Number Generators (RNGs) to ensure that all players get a fair chance of a win or loss. This is what puts the fun into playing online slot machines – why you can play the same slot and hit a big win one day and then win nothing the next – it’s just pure luck based on random outcomes.

Understanding A Slots Volatility

This is another key factor to consider when playing slots online is the volatility of the game. When talking about the volatility or variance of a slot, it refers to the amount of risk associated with a specific game. Volatility and variance are used to describe how often and how much you can expect to win during your play sessions. Some games can present long dry spells with occasional big wins. These are known as high variance/volatility slots, whereas low volatility slots you would see much more frequent yet smaller wins.

Higher Variance Slots

High variance slots amount to higher risk because whilst the payouts on these slots are much larger, they are fewer and farther between. You could end up burning through your balance with not a lot to show for it. High variance slots are usually popular with players who prefer games that offer the chance for big wins, and usually gamble bigger bankrolls which help keep them in the game before those big wins light up. But this is the part where high variance slots become just that more exciting and thrilling to play – the wins are that much bigger!

Low Variance Slots

On the flip side, low variance, or low volatility slots are usually popular among casual casino players. Low variance slots are perfect for those looking for smaller and regular wins. For most, it can be more fun to see wins light up on the screen regularly, but low variance slots are easier to keep their balance in check and not get depleted before you land some wins. Choosing a slot based on variance to suit your playing style is a must because you can avoid disappointment during your play session.

New Online Slots September 2021

The casino industry’s top game developers like Play N Go, Microgaming and Netent are in a never-ending battle to produce bigger and better slot games. The market is competitive so they need to constantly deliver a more adventurous and wild ride for you when you play online. This is great news for slot players as we are truly spoiled by the choice of premium slot games.

Trying out a new slot game can be a very exciting experience. Hundreds of new slots are released every month, so you’ll never be short of something new to try out. Here are some reasons why you should be seeking out the latest new online slots:

  • New & Exciting themes, including the latest branded themed in pop culture
  • New slots are often more exciting yet still simple to play.
  • New slots are more immersive and offer state of the art graphics and sound.
  • You can play new slots anywhere as there will be a fully functioning mobile slot
  • New and innovative slot bonuses and game features: You’ll explore new features you never knew existed before!
  • You can keep up with new slot trends

New Slot Sites 2021

One of the perks of playing at new slot sites is the guarantee that you can access new slot games and a generous welcome bonus too. Even if you already have a ‘go-to’ slot site that you know and love, there’s never any harm in trying something new. You may find that you prefer the new slot site over the old one. There are plenty of benefits to be had from trying new sites. Benefits include new slot bonuses, modern innovation, VR games, gamification, better loyalty schemes, access to new slots and progressive jackpots and often you’ll have a huge games portfolio at your disposal.

Trusted New Slot Sites

We have an extremely meticulous process when it comes to finding new slot sites to recommend to our readers. We’re always on the lookout for the latest sites, but before we add them to our top lists, we do a huge amount of research first. We have a team of experts out in the field, testing and selecting the best slot sites for you. Our aim is not to bring you just any old casino. We only bring you the best and most trusted new slot sites in the UK.

Vegas Hero
5/5
Welcome Bonus up to £100
50 Bonus Spins
  • Sister Casino
  • Well Known Company
  • Tons of Games
New players Only. £10 min deposit. £5 max bet using bonus. 60x (40x referred player) wagering applies. Bonus valid for 14 days. 10 Spins on pre-selected games will be credited instantly + then 10 per day for 4 days. Free Spins valid for 72 hours from credit. Max Free Spins winnings £100. Ewallets excluded. 18+ T&C Apply | BeGambleAware #AD
Plaza Royal
5/5
Welcome Bonus up to £50
100 Bonus Spins
  • Tons of Live Dealer Games
  • Trusted Casino Operator
  • Fun & Fuss Free Design
Applies only to new depositing players. 18+. Minimum deposit: £10. 35x Wagering requirement applies to match up bonus. Spins credited in specific games. Spins expire after 24 hours. Wagering requirement applies to spins. Terms and Conditions apply. T&C Apply | BeGambleAware #AD
Casino Planet
5/5
100% up to £100 Bonus
200 Bonus Spins
  • Popular UK Casino
  • Progressive Jackpots
  • Trusted Brand
New players Only. £10 min deposit. £5 max bet using bonus. 60x (40x referred player) wagering applies. Bonus valid for 14 days. 20 Spins will be credited instantly upon qualifying deposit + then 20 per day for 9 days on pre-selected games. Free Spins valid for 72 hours from credit. Max Free Spins winnings £100. Ewallets excluded. 18+ T&C Apply | BeGambleAware #AD
Spin Rio
4/5
Welcome Bonus up to £50
100 Bonus Spins
  • Reputable Operator
  • New for 2021
  • Salon Prive Live Casino Games
Terms and Conditions Apply. New Players only. 18+. Min First Deposit £10. Min Second and Third deposit: 20. Wagering requirement apply 35x. Offer valid for 72hr. Spins expire after 24hr. 100 spins includes 3 deposits. T&C Apply | BeGambleAware #AD
Lottomart Games
4/5
100% up to £100
Free Lotto Bets!
  • Great for Slots
  • Unique Design
  • Trusted Platform
18+ New customers only. All new players can get a 100% deposit match bonus on your deposit, up to £100 - Deposit at least £10 and claim up to £100. T&C Apply | BeGambleAware #AD
Casushi
5/5
Welcome Bonus up to £50
50 Bonus Spins
  • Sushi Themed Casino
  • VIP Club
  • Trusted Company
New customers only. Minimum first deposit of £20 required. Maximum promotion amount per player is £50 Bonus and 50 Free Spins. The welcome offer is not available on pre-paid card or e-wallet (Neteller and Skrill) deposits. Bonus and free spins will be credited automatically. 100% deposit bonus up to £50 bonus will be credited upon first deposit. 50 free spins will be received in 5 daily increments of 10 starting within 24 hours of first deposit. Free spins are only available on Starburst. Free spins value is £0.10 per spin. Bonus will expire 30 days after qualifying deposit. Free spins will expire 48 hours after being credited. 18+ T&C Apply | BeGambleAware #AD
Casino Lab
5/5
Welcome Bonus up to £100
300 Free Spins
  • Experienced Casino Company
  • Excellent UI & Theme
  • Premium Game Providers Only
Full T&C's apply. new players only. £10 min deposit. £5 max bet using bonus. 40x wagering applies. bonus valid for 14 days. 30 spins will be credited instantly upon qualifying deposit + then 30 per day for 9 days on pre-selected games. free spins valid for 72 hours from credit. max free spins winnings £100. eWallets excluded. T&C Apply | BeGambleAware #AD
Jackpot Village
5/5
Bonus up to £500
50 Bonus Spins
  • Great Bonus
  • Reputable Company
  • Loads of sister casinos
18+. New players only. 1 bonus offer per player. Min. deposit £20. Max bonus bet £5. Bonus spins on selected games only- must be used within 72 hours. Bonus funds expire in 30 days, unused bonus shall be removed. Bonus funds are T&C Apply | BeGambleAware #AD
Jonny Jackpot
4/5
500 Bonus Spins Welcome Package
Daily Promotions Calendar
  • Competitive Sign Up Bonus
  • Over 1,000 Top UK Casino Games
  • Daily Casino Promotions Calendar For All
New players only. One welcome package per player. Max bonus bet £5, Min deposit £20, 1​st deposit: get 100 bonus spins, 2​nd​ Deposit: get 75 bonus spins, 3​rd​ deposit: get 125 bonus spins, 4​th deposit: get 50 bonus spins, 5​th​ deposit: get 150 bonus spins. All spins are on slot game Book of Dead only. Bonus funds must be used within 30 days and bonus spins within 10 days. Spins winnings credited as bonus. ​Max winnings from bonus spins are equivalent to the number of spins awarded. ​Bonus funds separate to cash funds and are subject to 35x wagering and withdrawal requirements. Terms Apply. T&C Apply | BeGambleAware #AD
Slingo Casino
5/5
Welcome Bonus up to £50
  • Flagship Slingo Casino Brand
  • Tons of Slingo Games, Slots & Live Games
  • Trusted Casino - Heavily Licensed = Safe!
Min. deposit: £20, max. Bonus £50. WR of 30x Deposit + Bonus amount (only Slots count) within 30 days. Max bet is 10% (min £0.10) of the Bonus amount or £5 (lowest amount applies). First Deposit only. Can only be claimed once every 72 hours across all Casinos. Bonus Policy applies. T&C Apply | BeGambleAware #AD
CasiGO
4/5
825 Bonus Spins Welcome Package
Daily Promotions Calendar
  • Fantastic Sign Up Bonus
  • Well Known Casino Sister Site
  • Play The Best UK Slots & Jackpots
New players only. One Welcome Package per player. Max Bonus Bet £5. Get 3 Bonus spins for every £1 deposited up to 165 spins for each of your first 5 deposits. Min. deposit is £20. All spins are on Book of Dead only. Bonus funds must be used within 30 days and bonus spins within 10 days. Spins winnings are credited as a bonus and capped at an amount equivalent to the number of spins awarded. Bonus funds separate from Cash funds, and are subject to 35x wagering and withdrawal requirements. T&C Apply | BeGambleAware #AD
Hyper Casino
4/5
100% up to £300
10% Cashback
  • Unique Design
  • Trusted Sister Casino Brand
  • Always Cashback
#AD New players only, min deposit £10, wagering 45x, max bet £5 with bonus funds, 100% up to £100 bonus on 1st deposit, 50% up to £200 on 2nd deposit. No max cash out on deposit offers. Welcome bonus excluded for players depositing with Skrill or Neteller. Full T&C’s apply T&C Apply | BeGambleAware #AD
Lucky Louis Casino
3.5/5
50 SUPER Spins
Higher Value Spins & Daily Promotions
  • Fun Theme & Trusted Company
  • Tons of Popular Games
  • Secure Casino & Payment Platform
100% up to 50 Super Spins on your first deposit. First Deposit Only. Min. deposit: £10. Game: Book of Dead, Spin Value: £0.5, Max Free Spins: 50. WR 60x free spin winnings amount (only Slots count) within 30 days. Max bet is 10% (min £0.10) of the free spin winnings amount or £5 (lowest amount applies). Free Spins must be used before deposited funds. First Deposit/Welcome Bonus can only be claimed once every 72 hours across all Casinos. Bonus Policy applies. T&C Apply | BeGambleAware #AD

All of the most popular online gambling sites offer 1000’s of slot machines online, but which ones are the most popular amongst players? Whilst personal choice mainly comes into it, there are some standout slot games that are hugely popular in the UK at the moment.

The reason they are popular is simple. These slots are designed with great graphics, offer tons of fun and exciting game features and most importantly – they offer you the chance to win huge jackpots. Look out for the following types of slot games that are really hot right now:

  • Megaways Slots: Well known popular slots that have collaborated with Megaways to offer larger payouts and jackpots!
  • Must Fall Jackpots: Slots that offer large Jackpots that fall every day!
  • Slingo Slots: A hugely popular hybrid of slots and online bingo games
  • Monopoly Slots: Another classic that needs no introduction, but there are plenty of monopoly slots available at reading online casinos.
  • Classic Slots: Everyone loves a good old fashioned classic slot now and then, don’t they?
  • Branded Slots like Vikings, Ted, Grease, Bridesmaids, Game of Thrones, The Last Kingdom – so many branded slots available!
  • Fluffy Favourites slots: Many versions of a UK must play!
  • Double Bubble Slot: New slot sites with double bubble slot – hugely popular
  • Rainbow Riches: Plenty of charm in these leprechaun themed slots and plenty of different versions of the game

UK Slots Bonuses

Online casinos are ever-changing to meet the demands of the customer and also the stiff competition of their rivals. One thing that’s always changing at slot sites is the casino bonuses. Rarely, 2 casino bonuses will be the same. when you read the fine print, but there are plenty that is similar, such as the bonus types we help explain below:

Free Spins Bonuses

Free spins bonuses are slots bonuses that are designed to give you a number of free spins on a chosen slot machine, often chosen by the casino. Free Spins are designed to help you sample not only the slot but also to experience the online casino. You can get free spins bonuses on their own or as part of a package, usually when you sign up at a new casino and claim their welcome bonus. Sometimes the winning from these spins will be paid as cash and sometimes they will be rolled over into a bonus amount.

Free Spins No Deposit Required 

Casino free spins are exactly the same bonus as above, only you do not need to deposit any of your own money to claim them – the casino will pay! This is a great way to get a taste of a new casino and play no deposit slots. When you receive online slots free spins with no deposit required, make sure you watch out for the bonuses terms and conditions. They are usually far more strict, as they’re entirely ‘free’. No wagering online casinos also hand out slots free spins. but you can keep what you win so these are far more enjoyable and ‘real’ if you ask us, Check them out.

Match Deposit Bonuses

A casino ‘deposit bonus’ is another popular form of casino bonus. When claiming a deposit bonus, the casino will match the amount that you deposit up to a certain amount, usually a percentage and up to a max amount, in or around the £200 mark. For example, if you claimed a 100% up to £100 bonus and you deposited £50, the casino would award you with a £50 bonus to play with too. The bigger deposit bonuses are usually reserved for new customers claiming “welcome deposit bonuses”. However, it’s not uncommon to see competitive reload bonuses and other reward bonuses because casinos want to retain their player pool and not see their customers play at competitor casinos,

Cashback Slot Bonuses

A cashback bonus is designed to refund some of your losses back to your account and is usually based on how much you play and the amount that you originally deposited. Cashback bonuses are quite rare to find but one thing’s for sure- they do offer good value if you can get a hold of one.

200% Slots Deposit Bonus

A 200% slots bonus will give you twice as much money in a bonus as you put in. For example, a 200% welcome bonus will triple your casino balance. Although rarer to find as they offer such good value, you will find many 200% slots bonuses at recommended UK slot sites. Simply browse our casinos and find the perfect 200% deposit bonus to play slots in UK casinos.

Sign Up Slots Bonus

A Signup bonus is a no deposit casino bonus. You get a no deposit sign up bonus for slots when you create an account. Free sign up bonuses are really helpful in getting a clear picture of whether it is a place worth your money or not.

Slots Bonuses & Wagering Requirements

Make sure that you’re aware that all slot bonuses, no matter where you end up playing, will come with a wagering requirement attributed (unless you opt for wager free bonuses). We’ve mentioned wagering requirements (sometimes called playthrough requirements) numerous times throughout this website. But we wanted to make sure when you take a casino bonus of any kind, that you’re aware of some restrictions that may be placed on them. This is to avoid disappointment when you want to cash out for example – but you won’t be able to.

Why Wager Requirements Exist

The main idea behind a wagering requirement is to make sure that customers don’t simply take the winnings and cash out before playing any games. It’s also to make sure that the casino protects itself when giving out so much free money – as that’s what a casino bonus essentially is. A casino is happy to offer a player a reward for signing up, but they need to work for this reward and maintain a safe and healthy casino market. Our top tip for anyone claiming UK slots bonuses is to always read the bonuses full terms and conditions.

Online Slots FAQ's

We’ve tried to cover as much ground and information about slots as we could on this page, but there may be other questions you have on your mind before you start to play any slot online. Below, we have gone to town on some of the most frequently asked questions about online slots. We hope we’ve answered all of your questions, but of course- if not, feel free to contact us – we’d be glad to help out with more information that you’re seeking.

    What Makes a Slot Random & Fair?

    A slots 'Random Number Generator' (or RNG for short) is what makes the slot random and fair. It's inbuilt into the software and the makeup of the slot and its purpose is to make sure that the game gives completely random outcomes. To ensure that they really are random, all UK slot available at licensed casinos are third party checked by independent labs, reporting back to the UK Gambling Commission, to ensure that they have a provably fair outcome.

    A slots 'Random Number Generator' (or RNG for short) is what makes the slot random and fair. It's inbuilt into the software and the makeup of the slot and its purpose is to make sure that the game gives completely random outcomes. To ensure that they really are random, all UK slot available at licensed casinos are third party checked by independent labs, reporting back to the UK Gambling Commission, to ensure that they have a provably fair outcome.

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