| Site Name | Area | Last Modified |
|---|---|---|
| FAIRY CAVE QUARRY CAVES | Mendip | 22 Jun 2025 |
| FERNHILL CAVE | Mendip | 19 Jun 2023 |
| FIVE BUDDLES SINK | Mendip | 23 Apr 2020 |
| FLOWER POT | Mendip | 23 Apr 2020 |
| FOOTBALL FIELD QUARRY | East Surrey Mines | 28 Nov 2023 |
| FOSSIL AND HIGHER HEADLANDS QUARRY CAVES | Portland (Dorset) | 10 Jun 2020 |
| FOXES HOLE | Mendip | 19 Jun 2025 |
| G.B. CAVE | Mendip | 07 Jan 2025 |
| GOATCHURCH CAVERN | Mendip | 01 Jan 2005 |
| GODSTONE HEARTHSTONE MINES | East Surrey Mines | 28 Nov 2023 |