Online Slots Casino: Compare the best online slots casinos in the UK 2025

UK online slots players often begin their search for a new casino by looking at the welcome bonus. And the good news is that most welcome bonuses are great for UK players wanting to play slots online. Here, then, we're looking for multi-part bonuses with a healthy dose of free spins for some of the most popular slots – and low wagering requirements too (see below).

Free spins for some of the industry's best slots will be included in the welcome bonus. We're talking video slots in the main. Jackpot slots clearly won't be included in free spins bonuses (imagine someone winning millions of pounds for free!). But we always look for regular free spins promotions on a weekly basis too. This is especially useful when trying out new slots.

New customers can struggle to wrap their heads around wagering requirements. Therefore, we expect online casino deals to be written in plain English. Also, we want to see standard wagering requirements of around 35 times the bonus amount – when it's also applied to the deposit, we suggest walking away. The same goes for when the wagering is in excess of 35x.

New customers looking to play slots online want a stellar game selection from which to choose. This should include classic slot machines, video slots and jackpot slots. And these should come from some of the best developers on the planet. Therefore, we always want to find not only a large selection of online slots but also that the top quality providers are on board.

Having hundreds or even thousands of top online slot games is all well and good. But many UK players also want to mix things up from time to time. Therefore, other casino games should be plentiful. We're talking online roulette, blackjack and baccarat for starters. And a casino site will always get bonus points for serving up live casino games, poker, bingo and sports betting.

While casino bonuses and popular games take all the headlines, ensuring that your preferred payment method is supported is vital for a good experience. We check things like whether or not a payment method is accepted for welcome bonuses, if any fees are charged and if the withdrawal times are within industry standards. All these things can impact your game time.

Shit happens. And when something goes wrong in the middle of the night, you'll want to resolve that issue as soon as possible. Having a knowledgeable, friendly and prompt customer support team on your side is key. That's why we routinely test response times and answers. And there are bonus points for 24/7 support via live chat, email and a UK freephone number.

We won't touch unreliable and blacklisted sites with a barge pole. And you shouldn't either. That's why we always look for full encryption across all pages of an online casino. Without these basic protocols, you could be risking your personal or financial data. On the same note, we will praise any site that offers two-factor authentication to help protect customer info.

A site targeting UK players without a casino license from the esteemed UK Gambling Commission is a huge red flag. The UK Gambling Commission works tirelessly to protect online casino players from rogue actors. That's why we go looking for a valid UKGC license before even considering a site for inclusion in our expert online casino reviews section.

Classic slots (commonly known as fruit machines in the UK) are based on the one-arm bandits of yesteryear. They have a retro feel and symbols comprised of traditional fruits, BARs and bells. They are dead simple too – often only featuring a single payline in the middle and little to no bonus rounds. Because of this, they offer an easy route for beginners to play online slots.

The most common form of slot is the video slot. They can be simple or vastly complex. Some feature thousands of paylines (such as the Megaways slots), while others throw in different bonus rounds that are mini-games in and of themselves. The game mechanics are just as weird and wonderful, too, with things like cascading reels and huge multipliers adding excitement.

Similar to video slots, branded slot machines go one step further. They are tied to huge media franchises. For example, TV shows like The Walking Dead and Rick and Morty, movies like The Lord of the Rings and Gladiator and famous artists like Guns N' Roses and Jimi Hendrix. And because branded slots have much more money behind them, the quality is extremely high.

Progressive jackpots are what you read about whenever there's a big win. That's because a small amount of each wager is added to a prize pool over weeks or months from linked video slots all over the world in thousands of online casinos. In turn, this means some progressive jackpot slots like Mega Moolah and Mega Fortune offer millions of pounds in prizes on a single spin.

Lastly, there's a new breed of online slots based on the same blockchain technology that powers Bitcoin casinos. You may, in fact, see these games given the name Provably Fair. That's because blockchain technology is basically a write-only digital ledger or spreadsheet showing every transaction. In this, way every single spin on a crypto slot can be tracked and traced.