| Calke Abbey NT, Derbyshire | England: Mid | 165 | 422.4 | 74 | 1998 - 2004 |
| Forest of Dean, West Gloucestershire | England: Mid | 89 | 410.1 | 30 | 1965 - 1998 |
| Powis Castle Park (total), Montgomeryshire | Wales | 170 | 380.0 | 71 | 1994 - 2003 |
| Bushy Park & Home Park, Middlesex | England: South | 255 | 620.4 | 142 | 1996 - 2013 |
| Scadbury Park, West Kent | England: South | 71 | 321.1 | 17 | < 1998 |
| Site A, Evesham, Worcestershire | England: Mid | 73 | 472.6 | 41 | < 1996 |
| Staverton Park, East Suffolk | England: South | 106 | 412.3 | 48 | < 1986 |
| Thorne Moors, South-west Yorkshire | England: North | 86 | 269.8 | 16 | < 1985 |
| Thursley Commons, Surrey | England: South | 128 | 371.9 | 34 | < 2002 |
| Richmond Park (total), Surrey | England: South | 253 | 628.5 | 158 | 1950 - 2006 |
| Croome Park, Worcestershire | England: Mid | 110 | 560.0 | 62 | < 1999 |
| Abernethy Estate, East Inverness-shire | Scotland | 142 | 678.2 | 18 | < 1994 |
| Arundel Park, West Sussex | England: South | 130 | 458.5 | 53 | < 1999 |
| Box Hill, Surrey | England: South | 225 | 552.0 | 68 | < 1997 |
| The Mens, West Sussex | England: South | 139 | 463.3 | 57 | < 2010 |
| Kedleston Park NT, Derbyshire | England: Mid | 143 | 378.3 | 58 | < 2014 |
| Dinefwr Deer Park, Carmarthenshire | Wales | 156 | 385.3 | 57 | < 1999 |
| Llanover Park, Monmouthshire | Wales | 118 | 342.4 | 37 | < 1996 |
| Mill Bank, Penallt, Monmouthshire | Wales | 43 | 297.7 | 9 | < 2014 |
| Penallt Woods, Monmouthshire | Wales | 57 | 291.2 | 11 | 2007 - 2013 |
| Old Cilgwyn, Cardiganshire | Wales | 64 | 265.6 | 13 | < 1998 |
| Maesllwch Castle, Radnorshire | Wales | 22 | 236.4 | 1 | 1994 - 2014 |
| Windsor Forest, Berkshire | England: South | 363 | 765.8 | 255 | < 1998 |
| Donington Park (total), Leicestershire (with Rutland) | England: Mid | 122 | 441.8 | 54 | 1971 - 2014 |
| Richmond Park (1980-2006), Surrey | England: South | 205 | 535.1 | 111 | 1980 - 2006 |
| Kemerton Estate, Worcestershire | England: Mid | 170 | 437.1 | 75 | 1992 - 2014 |
| Studley Royal, Mid-west Yorkshire | England: North | 100 | 342.0 | 33 | 1901 - 2016 |
| Croome Estate, Worcestershire | England: Mid | 175 | 597.1 | 110 | 1995 - 2016 |
| Shotover Hill, Oxfordshire | England: South | 155 | 441.3 | 72 | 1999 - 2017 |
| Felbrigg Hall Estate (NT), East Norfolk | England: South | 135 | 382.2 | 46 | 1988 - 2018 |
| Nettlecombe Park, South Somerset | England: South-West | 129 | 355.0 | 57 | 1988 - 2019 |
| Dunham Massey Park (2021), Cheshire | England: Mid | 89 | 377.5 | 45 | 2021 |
| Petworth Deer Park (NT), West Sussex | England: South | 195 | 500.5 | 85 | 1988 - 2020 |
| Chirk Castle Park (NT), Denbighshire | Wales | 194 | 404.6 | 80 | 1993 - 2018 |
| Oxburgh Hall, West Norfolk | England: South | 96 | 447.9 | 36 | 2013 - 2022 |
| Abney Park Cemetery, Middlesex | England: South | 86 | 489.5 | 29 | 2006 - 2024 |
| Burnham Beeches (inc. Dorneywood NT and Huntswood Farm), Buckinghamshire | England: South | 284 | 624.6 | 176 | < 2022 |
| Weald Country Park (total), South Essex | England: South | 128 | 495.3 | 63 | < 2010 |
| Wimpole Hall Estate (NT), Cambridgeshire | England: South | 203 | 498.0 | 91 | 1986 - 2023 |
| Wicken Fen (NT), Cambridgeshire | England: South | 152 | 447.4 | 59 | 1980 - 2023 |
| Danbury Common (NT) & Danbury Park, South Essex | England: South | 120 | 417.5 | 40 | 1976 - 2019 |
| Bredon Hill, Worcestershire | England: Mid | 230 | 597.0 | 145 | 1970 - 2025 |
Saproxylic Quality Index