In brief: A slot pays when matching symbols land according to its paytable. Check two numbers before playing: RTP and volatility.
Seven popular slots
| Slot | Developer | Default RTP | Volatility | Max win |
|---|
| Big Bass Bonanza | Pragmatic Play | 96.71% | High | 2,100x |
|---|
| Starburst | NetEnt | 96.09% | Low | 500x |
|---|
| Sweet Bonanza | Pragmatic Play | Varies by version (96.48% to 96.51% quoted) | High | 21,100x |
|---|
| Gates of Olympus | Pragmatic Play | 96.50% | High | 5,000x |
|---|
| Book of Dead | Play'n GO | 96.21% | High | 5,000x |
|---|
| Fishin' Frenzy | Blueprint Gaming (Reel Time Gaming) | 96.12% | Medium to high | 5,000x |
|---|
| Fluffy Favourites | Eyecon | 95.39% | High | 5,000x |
|---|
Developers' default figures, each confirmed against two sources. Casinos may run lower RTP versions.
The two numbers
RTP is the share of stakes returned over the long run; 96% is typical. Volatility is how unevenly it arrives. See RTP and house edge.
Ranked: high RTP slots. Offers: slots bonuses.
Slot games by name
Starburst, Big Bass Bonanza, Sweet Bonanza, Fluffy Favourites. Also free slots, jackpot slots, new slots and slot sites.
Online slot machines
"Slots", "slot games", "slot machines" and "casino slots" all mean the same thing online. British slots follow one set of rules wherever you play.
UK rules
- £5 a spin; £2 for ages 18 to 24.
- At least 2.5 seconds a spin.
- No autoplay and no bonus buy.
Slots by casino
| Casino | Reported library | Games score | Slot bonus |
|---|
| Casumo | 3,500+ games | 9.0/10 | 50% bonus up to £100 |
|---|
| Coral | 2,000+ games (some reports put it far higher) | 8.5/10 | Bet £10 on slots, get 100 free spins |
|---|
| Ladbrokes | 2,000+ games | 8.5/10 | Play £10 on slots, get up to 500 free spins |
|---|
| PlayOJO | 2,000+ games (reports range to 7,000 and above) | 8.5/10 | 80 free spins, no wagering |
|---|
| 10bet | 2,000+ games (reports range from 1,200) | 8.0/10 | 100% bonus up to £25 |
|---|
Ad 18+ only. We may earn commission from these links. Advertiser disclosure
Coral Casino ★ 4.3 out of 5
Bet £10 on slots, get 100 free spins
No wageringFree spins
- Wagering
- None
- Minimum
- £10
- Time limit
- 48 hours to accept, then 7 days
- Worked value
- 100 spins at £0.10 (£10 in spins)
Significant terms: 18+. New players only. Offer runs 01/10/2026 to 01/02/2027. Deposit (certain types excluded) and bet £10+ on slot games to get 100 free spins (selected games, £0.10 each, 48 hrs to accept, valid 7 days). No wagering on free spin winnings. Deposits by Neteller, PayPal, Paysafe, Skrill, prepaid cards and certain debit cards do not qualify. Restrictions and T&Cs apply. BeGambleAware.org
Ladbrokes Casino ★ 4.2 out of 5
Play £10 on slots, get up to 500 free spins
No wageringFree spins
- Wagering
- None
- Minimum
- £10
- Time limit
- Claim daily for 10 days; each batch valid 7 days
- Worked value
- Up to 500 spins at £0.10 (up to £50 in spins)
Significant terms: 18+. New customers only, from 14/11/25 until further notice. Certain deposit methods excluded. Deposit and spend £10+ on slots for 50 free spins a day during the first 10 days after first deposit and registration (max 500, £0.10 each, selected games, claim before 23:59 each day, valid 7 days). No wagering. Prepaid cards, PayPal, Paysafe, Neteller, Skrill and Moneybookers deposits do not qualify. Restrictions and T&Cs apply. BeGambleAware.org
PlayOJO ★ 4.2 out of 5
80 free spins, no wagering
No wageringFree spins
- Wagering
- None
- Minimum
- £10
- Time limit
- See offer terms
- Worked value
- 80 spins at £0.10 (£8 in spins)
Significant terms: 18+. First deposit only. Minimum deposit £10. 80 free spins on Big Bass Bonanza, £0.10 each. No wagering requirements; winnings paid in cash. Cannot be used with any other offer. Only available to players who arrive through the designated offer link. Full T&Cs apply. BeGambleAware.org
More games: Online roulette UK, Online blackjack UK and Online baccarat UK.
Elsewhere in games: Online blackjack UK, Live casino UK and Roulette bets and odds.
Slots and lists: Free slots UK, Starburst UK and Slot sites UK.
Offer terms dated 5 October 2026, from each casino's published conditions. Other casino details are reported by independent reviews. How we check. 18+. Free help: 0808 8020 133 or safer gambling.
