| Helensburgh Pier Family Amusement Park | Helensburgh, Argyll and Bute, Scotland, United Kingdom | - | ≤ | - |
| Hemsby Fun Park | Hemsby, Norfolk, England, United Kingdom | Operating | | - |
| Hornsea Park | Hornsea, East Riding of Yorkshire, England, United Kingdom | - | ≤ | - |
| Hull Zoological Gardens | Kingston upon Hull, East Riding of Yorkshire, England, United Kingdom | - | | - |
| Joyland Childrens Fun Park | Great Yarmouth, Norfolk, England, United Kingdom | Operating | | 2 |
| Jungle Park | Skegness, Lincolnshire, England, United Kingdom | - | ≤ | - |
| Kidz Island | Southsea, Hampshire, England, United Kingdom | Operating | - | 1 |
| Killarney Springs Family Park | Bude, Cornwall, England, United Kingdom | - | - | - |
| Knightly's Funfair | Towyn, Gwynedd, Wales, United Kingdom | Operating | | 1 |
| Knowsley Safari | Prescot, Merseyside, England, United Kingdom | Operating | | 1 |
| Kursaal Amusement Park | Southend On Sea, Essex, England, United Kingdom | - | | - |
| Landmark Forest Adventure Park | Carrbridge, Highland, Scotland, United Kingdom | Operating | | - |
| Legoland Windsor | Windsor, Berkshire, England, United Kingdom | Operating | | 4 |
| Leisure Island Fun Park | Canvey Island, Essex, England, United Kingdom | Operating | - | 2 |
| Leisureranch | Weymouth, Dorset, England, United Kingdom | Operating | ≤ | - |
| Lightwater Valley | Ripon, North Yorkshire, England, United Kingdom | Operating | | 3 |
| Liverpool Exhibition | Liverpool, Merseyside, England, United Kingdom | - | | - |
| Llandudno Pier | Llandudno, Conwy, Wales, United Kingdom | Operating | | 1 |
| Lost World Adventure Park | Skegness, Lincolnshire, England, United Kingdom | - | ≤ | - |
| Loudoun Castle | Galston, East Ayrshire, Scotland, United Kingdom | SBNO | - | - |
| Luna Park | Scarborough, North Yorkshire, England, United Kingdom | Operating | ≤ | - |
| Mack's Amusements | Cleethorpes, Lincolnshire, England, United Kingdom | Operating | ≤ | 1 |
| Manning's Amusement Park | Felixstowe, Suffolk, England, United Kingdom | Operating | | - |
| Marine Gardens | Edinburgh, Scotland, United Kingdom | - | | - |