| Site Name | Area | Last Modified |
|---|---|---|
| BARTON SHELTER | Mendip | 19 Nov 2006 |
| BATH SWALLET | Mendip | 01 Jan 2005 |
| BATTERY SWALLET | Mendip | 11 Mar 2011 |
| Beacon Slocker East | Mendip | 23 Apr 2020 |
| Beacon Slocker West | Mendip | 15 Feb 2020 |
| BLACKMOOR NATURE RESERVE | Mendip | 14 May 2022 |
| BLACKMOOR SWALLET (STAINSBY'S SHAFT) | Mendip | 05 Aug 2024 |
| BLACKNOR HOLE | Portland (Dorset) | 07 Jan 2025 |
| BLAKE’S FARM SWALLET | Mendip | 14 May 2019 |
| BLEADON CAVERN | Mendip | 02 Jun 2019 |