Online Casino London Bonuses & Codes 2025

Discover the latest Online Casino London casino bonuses in 2025. See how fair their terms are, how they compare to 132 UK offers, and what they mean for your chance to win real money.

Online Casino London Featured Image
Spin the Mega Reel to win up to 500 free spins on Starburst.
65x FS Wagering - £250 Win Cap - £10 Min Deposit
3.4 / 5
Rated #38 out of 132 Bonuses
New players only, £10+ fund, free spins won via Mega Reel, 65x bonus wagering req, max bonus conversion to real funds equal to lifetime deposits (up to £250), T&Cs apply

For more information about games, features, payment options and more, read our Online Casino London review.

Online Casino London Welcome Bonus

Spin the Mega Reel to win up to 500 free spins on Starburst.

Online Casino London offers you a chance to spin the Mega Reel when you make your first deposit of £10 or more. The Mega Reel awards prizes ranging from free spins on top slot games like Fluffy Favourites and Starburst to Amazon vouchers. This bonus provides an exciting opportunity to enhance your gaming experience with additional rewards.

Starburst
3.4 / 5
Ranked #38 out of 132 Bonuses

Free Spins:

500 FS
Free Spins Wagering:
65x

Max win:

£250

Min Deposit:

£10 Min Deposit

Bonus Game RTP:

96.09%
Play Here
New players only, £10+ fund, free spins won via Mega Reel, 65x bonus wagering req, max bonus conversion to real funds equal to lifetime deposits (up to £250), T&Cs apply

How Fair and Valuable Is This Bonus?

The bonus terms indicate fair bonus conditions, placing it within the average range of UK casino offers.

Our bonus rating system scored this offer 3.4 out of 5 for fairness and value, ranking it #38 out of 132 UK casino bonuses we've reviewed.

To help you pick a bonus that's both fair and gives you a real chance to win, we use our bonus rating system. This system scores each key bonus term from 1 to 5 – where 1 means it’s not fair and 5 means it’s very fair compared to industry averages. Learn more about it in our bonus rating system guide.

Below, you'll find a detailed breakdown of the key bonus terms for this offer and their ratings.

High 65x Wagering Requirement

1/5

Online Casino London’s bonus comes with a 65x wagering requirement on any winnings from the free spins. This means you must wager 65 times the amount won from the bonus before withdrawing your winnings. This high wagering requirement can make it challenging to convert bonus winnings into real, withdrawable cash.

Explore our No Wagering Casino Bonuses for bonuses that let you withdraw your winnings without wagering.

Generous Bonus Amount

5/5

By spinning the Mega Reel, you have the chance to win up to 500 free spins on popular slot games like Starburst. The number of free spins awarded varies, providing an exciting range of potential bonuses to enhance your gameplay.

£250 Max Win Limit

3/5

Online Casino London’s bonus has a maximum bonus conversion equal to your lifetime deposits, up to a maximum of £250. This means you can convert bonus winnings to real money only up to the total amount you have deposited, capped at £250.

Fair Bonus Cost - £10 to Claim

4/5

You need to deposit a minimum of £10 to claim the bonus and spin the Mega Reel. This deposit amount is standard and offers an accessible way to participate in the promotion.

Explore our £1 deposit casino bonuses for offers requiring less money to claim.

An Average RTP Percentage: 96.09%

4/5

Starburst has an RTP of 96.09%, which is around the industry average for online slots. This means that, over time, the game is expected to return £96.09 for every £100 wagered, though actual outcomes will vary. Starburst delivers frequent but smaller wins as a low-volatility slot, making it ideal if you prefer a steady gameplay experience. With its expanding wilds and re-spins feature, this classic slot remains a favourite for simple yet engaging gameplay.

Overall, Online Casino London’s bonus provides an exciting chance to win up to 500 free spins on popular slots. However, the 65x wagering requirement and maximum conversion limit may make it difficult to withdraw large winnings. It’s an entertaining offer, but it’s important to be aware of the wagering conditions before you play.

Expert: Jack Carter

How to Claim Your Spin the Mega Reel to win up to 500 free spins on Starburst. Bonus at Online Casino London

To claim your bonus at Online Casino London, follow these steps:

  1. Register for a new account at Online Casino London.
  2. Add a valid debit card to your account upon registration.
  3. Make your first deposit of £10 or more.
  4. Receive a spin on the Mega Reel after your deposit is confirmed.
  5. Spin the Mega Reel to reveal your prize, which could be up to 500 free spins on selected slot games or Amazon vouchers.

How to Withdraw Real Money From this Bonus

To withdraw your bonus winnings, you must first meet the 65x wagering requirement on the bonus funds. Once the wagering requirement is fulfilled, you can request a withdrawal through your account. The maximum amount you can convert to real money is equal to your lifetime deposits, up to £250. Withdrawals are subject to a £2.50 transaction fee and may require you to complete KYC verification if not already done.

Top Bonuses From Alternative Casinos

Looking for more options? Below are 10 of our highest-rated casino bonuses from licensed casinos in the UK.
betfred casino
200 Free Spins on 'Age of The Gods: God of Storm 2'
0x FS Wagering - No Win Cap - £10 Min Deposit
4.8 / 5
Rated #1 out of 132 Bonuses
New customers only. Opt In required. £/€10 min stake on Casino slots within 30 days of registration. Max bonus 200 Free Spins on selected games credited within 48 hours. Free Spins expire after 7 days. iOS app restrictions may apply. Email/SMS validation may apply. Not available in NI. T&Cs Apply.
bet-365-casino-logo

Up to 200 Free Spins on selected games

0x FS Wagering - No Win Cap - £10 Min Deposit
4.8 / 5
Rated #2 out of 132 Bonuses
This offer is available to new and fully verified customers only. Eligible customers must have a minimum of £10 in lifetime deposits. T&Cs apply.
Image
100 Free Spins & 100 Bingo Tickets
0x FS Wagering - No Win Cap - £10 Min Deposit
4.7 / 5
Rated #3 out of 132 Bonuses
18+. New customers only. Min Deposit £10. Spend £10 on Slots to get 100 Free Spins (£0.10 each, valid for 7 days, valid on selected games). Spend £10 on Bingo to get 100 Bingo Tickets (£0.01 - £0.05, valid for 7 days). Player restrictions and T&Cs apply.
Party Casino Featured Image

50 Free Spins on selected slot games

0x FS Wagering - No Win Cap - £10 Min Deposit
4.6 / 5
Rated #4 out of 132 Bonuses
18+. UK & ROI only. New customers only. Deposit & spend £10, to get 50 Free Spins on selected slot games (Value £0.10 each). Use within 7 days. Restrictions and T&Cs apply.
play ojo casino

80 Free Spins on Big Bass Bonanza

0x FS Wagering - No Win Cap - £10 Min Deposit
4.6 / 5
Rated #5 out of 132 Bonuses
First deposit only. This offer is only available for first time depositors. Min deposit is £10. 80 Free Spins on Big Bass Bonanza. Spin Value: £0.10. This offer cannot be used in conjunction with any other offer. This offer is only available for specific players that have been selected by PlayOJO. If you have arrived on this page not via the designated offer via PlayOJO you will not be eligible for the offer. OJO’s Rewards and Game Play policy applies. Read more.
onyx slots logo

20 Free Spins on Zeus vs Hades Gods of War for each of your first 5 deposits of £10 or more

0x FS Wagering - £100 Win Cap - £10 Min Deposit
4.5 / 5
Rated #6 out of 132 Bonuses
New Customers Only. $/€/£10 Min. Deposit and Wager. 20 Free Spins will be allocated for each of your first 5 deposits of $/€/£10 or more. Bonus valid 48 hours from receipt. Max conversion: $/€/£100. Withdrawal requests void all active/pending bonuses. Full terms apply
leo vegas casino
50 free spins on 'Big Bass Splash'
0x FS Wagering - No Win Cap - £10 Min Deposit
4.5 / 5
Rated #7 out of 132 Bonuses
New cust only. Opt in & deposit £10+ in 7 days & wager 1x in 7 days on any eligible casino game (excluding live casino and table g
jackpot.com casino
50 Free Spins on Bigger Bass Bonanza
0x FS Wagering - £100 Win Cap - £15 Min Deposit
4.4 / 5
Rated #8 out of 132 Bonuses
This one-time offer is only available here for new UK customers of Jackpot.com. To participate a minimum £15 bet is required. Any terms not specified in these Special Promotional Terms, the Promotional Terms shall apply and will be subject to Jackpot.com Terms and conditions
Mr Q Featured Image

30 Free Spins on 'Rainbow Riches'

0x FS Wagering - No Win Cap - £10 Min Deposit
4.2 / 5
Rated #9 out of 132 Bonuses
First deposit only. Min deposit & spend £10. Max 30 spins on Rainbow Riches at 20p per spin. Spins credited upon spend of £10. 18+ Full T&Cs apply.
Peachy Games Featured Image

20 Bonus Spins on Big Bass Splash

0x FS Wagering - £250 Win Cap - £10 Min Deposit
4.2 / 5
Rated #10 out of 132 Bonuses
18+. Only available to new players. Minimum £10 first deposit required. 20 Bonus Spins on Big Bass Splash. No Wagering Requirements. Winnings credited directly to cash balance. Neteller and Skrill deposits excluded. Expiry: bonus spins expire 2 days after deposit. Further terms apply: