| Abernethy Estate, East Inverness-shire | Scotland | 142 | 678.2 | 18 | < 1994 |
| Parc Pont-faen, Cardiganshire | Wales | 45 | 264.4 | 10 | < 2002 |
| Gregynog, Montgomeryshire | Wales | 69 | 249.3 | 10 | < 1996 |
| Hafod Estate, Cardiganshire | Wales | 25 | 268.0 | 3 | < 1998 |
| Bothwell Castle, Lanarkshire | Scotland | 38 | 355.3 | 13 | < 2011 |
| Hatfield Forest, North Essex | England: South | 245 | 568.6 | 138 | 1986 - 2018 |
| Auchinleck Estate, Ayrshire | Scotland | 41 | 285.4 | 9 | 2000 - 2021 |
| Chirk Castle Park (NT), Denbighshire | Wales | 194 | 404.6 | 79 | 1993 - 2018 |
| Old Wood of Drum, South Aberdeenshire | Scotland | 21 | 371.4 | 9 | 2023 - 2024 |
| Old Wood of Drum, Channel Islands | England: South | 21 | 371.4 | 9 | 2023 - 2024 |
Saproxylic Quality Index