| Brean Theme Park | Brean, Somerset, England, United Kingdom | Operating | | 5 |
| Botton's Pleasure Beach | Skegness, Lincolnshire, England, United Kingdom | Operating | | 4 |
| Bosworth Water Trust Leisure Park | Market Bosworth, Leicestershire, England, United Kingdom | - | ≤ | - |
| Blair Drummond Safari and Adventure Park | Blair Drummond, Stirling, Scotland, United Kingdom | Operating | | 1 |
| | Blackpool New Fairground Company | Blackpool, Lancashire, England, United Kingdom | - | | - |
| Blackgang Chine | Ventnor, Isle of Wight, England, United Kingdom | Operating | | - |
| | Birnbeck Pier | Weston-Super-Mare, Somerset, England, United Kingdom | SBNO | | - |
| Billing Aquadrome | Northampton, Northamptonshire, England, United Kingdom | Operating | ≤ | 1 |
| | Big Sky Soft Play | Peterborough, Cambridgeshire, England, United Kingdom | Operating | - | - |
| Big Sheep | Bideford, Devon, England, United Kingdom | Operating | | 1 |
| | Belle Vue Park | Manchester, Greater Manchester, England, United Kingdom | - | | - |
| | Belfast Zoo | Belfast, Antrim, Northern Ireland, United Kingdom | Operating | | - |
| Bayside Fun Park | Bridlington, East Riding of Yorkshire, England, United Kingdom | Operating | ≤ | 2 |
| | Battersea Fun Fair | Battersea, Greater London, England, United Kingdom | - | | - |
| Barry Island Promenade Fun Park | Barry Island, Vale of Glamorgan, Wales, United Kingdom | Operating | ≤ | 1 |
| Barry Island Pleasure Park | Barry Island, Vale of Glamorgan, Wales, United Kingdom | Operating | | 3 |
| Babylon Park | Camden Town, Greater London, England, United Kingdom | Operating | | 1 |
| | Atlas Park | Clacton-on-sea, Essex, England, United Kingdom | - | | - |
| | Atlantis Family Amusement Park | Scarborough, North Yorkshire, England, United Kingdom | - | | - |
| Animal Farm Adventure Park | Berrow, Somerset, England, United Kingdom | Operating | ≤ | - |
| | Anglo-American Exhibition | London, Greater London, England, United Kingdom | - | | - |
| | Amtree Park | Filey, North Yorkshire, England, United Kingdom | - | | - |
| American Adventure Theme Park | Ilkeston, Derbyshire, England, United Kingdom | - | | - |
| Alton Towers | Alton, Staffordshire, England, United Kingdom | Operating | | 10 |