gbGreat Britain

Bristol — a club from South West England, playing at the SGS College Arena.

East Kilbride — Scotland's only club in Great Britain's top flight.

Ellesmere Port — a club founded in 1984, one of the league's oldest.

Leicester — winners of the play-off final in SLB's inaugural 2024/25 season, traditionally England's most successful club.

Liverpool — a brand-new club that brought top-flight basketball back to the city in August 2026 after more than a decade; without its own website yet (not to be confused with the older amateur Liverpool Basketball Club).

London — two-time SLB champions (2024/25, 2025/26), the league's most successful club.

Manchester — one of two entirely new clubs founded alongside the league's 2024 launch, playing at the National Basketball Centre.

Newcastle — historically the most successful British basketball club from the BBL era.

Sheffield — winners of the Cup in SLB's inaugural 2024/25 season.

Guildford — a club from South East England, the other of two entirely new teams formed when the league launched in 2024.