| Site Name | Area | Last Modified |
|---|---|---|
| WHITE PIT | Mendip | 02 Jun 2018 |
| WEST TWIN BROOK ADIT | Mendip | 29 Dec 2010 |
| WELSH’S GREEN SWALLET (KANGAROO SWALLET) | Mendip | 01 Jan 2005 |
| WCMS - SURREY MINES AGENT | East Surrey Mines | 28 Nov 2023 |
| WATERWHEEL SWALLET | Mendip | 13 Apr 2022 |
| WAKEHAM AND SOUTHWELL | Portland (Dorset) | 10 Jun 2020 |
| W/L CAVE | Mendip | 19 Jun 2023 |
| VIADUCT SINK | Mendip | 14 May 2019 |
| VERNE AND GROVE | Portland (Dorset) | 10 Jun 2020 |
| UPPER FLOOD SWALLET (BLACKMOOR FLOOD SWALLET) | Mendip | 01 Jun 2019 |