Casino Sultan – Best UK Casino Sister Sites 2026

What Are UK Casino Sister Sites?

UK casino sister sites are online casinos that share the same parent company, software platform, or operating licence. When a gambling group like Entain, Flutter Entertainment, or 888 Holdings owns multiple casino brands, those brands are considered sister sites of each other. They often share payment systems, game libraries, and backend infrastructure — but each operates as a separate brand with its own bonuses and player experience.

Why Search for Sister Sites?

Players search for sister sites for several reasons. If you’ve enjoyed playing at Ladbrokes but want a fresh sign-up bonus, a Ladbrokes sister site like Coral or bwin gives you access to a new welcome offer on familiar infrastructure. Sister sites are also useful when a casino’s withdrawal limits are too low — a sister site from the same group may have higher limits or faster processing.

Major UK Casino Groups & Their Sister Sites

Flutter Entertainment is the UK’s largest gambling group, owning Sky Bet, Sky Vegas, Paddy Power, Betfair, and tombola. All of these are sister sites of each other — all UKGC licensed, all GamStop registered.

Entain owns Ladbrokes, Coral, bwin, PartyPoker Casino, Gala Casino, and Sportingbet. If you play at one Entain casino, you’re using the same Orbis platform that powers all their brands.

888 Holdings owns 888 Casino, William Hill, Mr Green, Wink Slots, and several other brands. The 888 platform is known for its live dealer games and proprietary software.

MGM / LeoVegas Group owns LeoVegas, BetMGM UK, and Expekt. LeoVegas is particularly well-regarded for mobile casino experience.

Are UK Casino Sister Sites Safe?

Yes — every casino listed on Casino Sultan holds a valid UK Gambling Commission (UKGC) licence, which is one of the strictest regulatory frameworks in the world. UKGC-licensed casinos must comply with player protection rules, segregate player funds, and participate in the GamStop self-exclusion scheme. This means you’re always protected when playing at any UKGC-licensed sister site.

How We Rate UK Casino Sister Sites

Our team at Casino Sultan rates every UK casino sister site across five key areas:

• Licence & Safety — UKGC licence confirmed, GamStop status checked
• Bonus Value — welcome offer fairness, wagering requirements, T&Cs
• Game Library — number of slots, live casino tables, and software providers
• Payment Speed — withdrawal processing times and available methods
• Mobile Experience — app quality and mobile browser compatibility