| Sherwood Forest, Nottinghamshire | England: Mid | 164 | 493.9 | 96 | 1960 - 2006 |
| Calke Abbey NT, Derbyshire | England: Mid | 165 | 417.6 | 74 | 1998 - 2004 |
| Buddon Wood (total), Leicestershire (with Rutland) | England: Mid | 124 | 411.3 | 36 | < 1988 |
| Forest of Dean, West Gloucestershire | England: Mid | 89 | 428.1 | 30 | 1965 - 1998 |
| Danbury Common & Danbury Park, South Essex | England: South | 109 | 417.4 | 34 | 1976 - 2009 |
| Powis Castle Park (total), Montgomeryshire | Wales | 170 | 372.9 | 70 | 1994 - 2003 |
| Croxton Park, Leicestershire (with Rutland) | England: Mid | 51 | 278.4 | 18 | < 1988 |
| Bedwyn Brail, South Wiltshire | England: South-West | 39 | 212.8 | 3 | 2000 - 2004 |
| Bushy Park & Home Park, Middlesex | England: South | 255 | 629.0 | 141 | 1996 - 2013 |
| New Forest, South Hampshire | England: South | 324 | 782.7 | 200 | < 2000 |
| River Soar, Leicestershire (with Rutland) | England: Mid | 66 | 295.5 | 12 | < 1980 |
| Silwood Park, Berkshire | England: South | 159 | 605.0 | 86 | 1998 - 1999 |
| Walcot Park, Shropshire | England: Mid | 39 | 297.4 | 11 | < 1991 |
| Dunham Massey Park (Greater), Cheshire | England: Mid | 84 | 291.7 | 27 | < 1992 |
| Langley Park, Buckinghamshire | England: South | 152 | 686.2 | 110 | 1979 - 2008 |
| Richmond Park (total), Surrey | England: South | 253 | 644.3 | 157 | 1950 - 2006 |
| Moccas Park, Herefordshire | England: Mid | 239 | 576.6 | 138 | < 1998 |
| Epping Forest, South Essex | England: South | 252 | 560.3 | 128 | < 1979 |
| Cliveden NT, Buckinghamshire | England: South | 71 | 501.4 | 33 | 2008 |
| Dunham Park (total), Cheshire | England: Mid | 151 | 468.9 | 60 | < 1977 |
| Ebernoe Common, West Sussex | England: South | 141 | 507.1 | 53 | < 2011 |
| Stanford PTA, West Norfolk | England: South | 183 | 414.8 | 74 | 1980 - 2009 |
| The Mens, West Sussex | England: South | 139 | 441.0 | 56 | < 2010 |
| Hainault Forest, South Essex | England: South | 94 | 403.2 | 41 | 1970 - 2007 |
| Chiddingfold Woods, Surrey | England: South | 164 | 371.3 | 37 | < 2003 |
| Highgate Wood, Middlesex | England: South | 107 | 404.7 | 36 | < 2002 |
| Kedleston Park NT, Derbyshire | England: Mid | 143 | 372.7 | 58 | < 2014 |
| Dinefwr Deer Park, Carmarthenshire | Wales | 156 | 362.8 | 57 | < 1999 |
| St Fagans, Glamorganshire | Wales | 58 | 356.9 | 15 | 1997 - 1999 |
| Llanover Park, Monmouthshire | Wales | 118 | 330.5 | 37 | < 1996 |
| Eridge Park, East Sussex | England: South | 80 | 308.8 | 17 | < 1999 |
| Mill Bank, Penallt, Monmouthshire | Wales | 43 | 297.7 | 9 | < 2014 |
| Cadzow & Hamilton High Parks, Lanarkshire | Scotland | 44 | 352.3 | 18 | < 2010 |
| Penallt Woods, Monmouthshire | Wales | 57 | 291.2 | 11 | 2007 - 2013 |
| Milton-Lockhart Estate, Lanarkshire | Scotland | 55 | 336.4 | 12 | < 2009 |
| Erddig, Denbighshire | Wales | 67 | 283.6 | 14 | < 1999 |
| Parc Pont-faen, Cardiganshire | Wales | 45 | 253.3 | 10 | < 2002 |
| Parc Nanteos, Cardiganshire | Wales | 45 | 233.3 | 7 | < 1999 |
| Gregynog, Montgomeryshire | Wales | 69 | 233.3 | 10 | < 1996 |
| Pwl-Mawr, Penallt, Monmouthshire | Wales | 16 | 243.8 | 1 | 2013 |
| Penrice Castle, Glamorganshire | Wales | 19 | 194.7 | 3 | 1994 |
| Nannau Estate, Merionethshire | Wales | 25 | 204.0 | 2 | 1998 |
| Nicholaston Woods, Glamorganshire | Wales | 21 | 314.3 | 8 | < 1993 |
| Windsor Forest, Berkshire | England: South | 363 | 801.7 | 254 | < 1998 |
| Bothwell Castle, Lanarkshire | Scotland | 38 | 342.1 | 13 | < 2011 |
| Donington Park (total), Leicestershire (with Rutland) | England: Mid | 122 | 438.5 | 53 | 1971 - 2014 |
| Donington Park (<1994), Leicestershire (with Rutland) | England: Mid | 79 | 424.1 | 38 | < 1994 |
| Richmond Park (1980-2006), Surrey | England: South | 205 | 539.0 | 110 | 1980 - 2006 |
| Stowe, Buckinghamshire | England: South | 106 | 467.0 | 58 | 1990 - 2015 |
| Bothwell Castle (update), Ayrshire | Scotland | 35 | 320.0 | 13 | 1960 - 2016 |
| Burley Wood, Leicestershire (with Rutland) | England: Mid | 72 | 269.4 | 12 | < 1988 |
| Buddon Wood (post 1980), Leicestershire (with Rutland) | England: Mid | 79 | 308.9 | 14 | 1980 - 1988 |
| Burley-on-the-Hill Estate, Leicestershire (with Rutland) | England: Mid | 90 | 302.2 | 19 | 1988 - 2016 |
| Perivale Wood, Middlesex | England: South | 53 | 471.7 | 17 | 2013 - 2016 |
| Hanbury Park, Worcestershire | England: Mid | 38 | 436.8 | 13 | 2008 - 2016 |
| Hanbury Park, Worcestershire | England: Mid | 58 | 501.7 | 26 | 1998 - 2016 |
| Polesden Lacy & Ranmore Common NT, Surrey | England: South | 49 | 232.7 | 4 | 1996 - 2011 |
| Shotover Hill, Oxfordshire | England: South | 155 | 434.8 | 71 | 1999 - 2017 |
| Hatfield Forest, North Essex | England: South | 245 | 591.4 | 138 | 1986 - 2018 |
| Oxburgh Hall (NT), Hertfordshire | England: South | 63 | 436.5 | 20 | 2006 - 2018 |
| Woodwalton Fen NNR, Huntingdonshire | England: Mid | 57 | 333.3 | 16 | 1961 - 2019 |
| Blickling Park (NT), East Norfolk | England: South | 117 | 378.6 | 43 | 1982 - 2019 |
| Ashridge Estate (NT), Hertfordshire | England: South | 234 | 543.6 | 110 | 1986 - 2020 |
| Nettlecombe Park, South Somerset | England: South-West | 129 | 334.9 | 57 | 1988 - 2019 |
| Millichope Park, Shropshire | England: Mid | 103 | 394.2 | 52 | 2020 - 2021 |
| Tatton Park (2011-21), Cheshire | England: Mid | 122 | 425.4 | 53 | 2011 - 2021 |
| Dunham Park (1950-77), Cheshire | England: Mid | 93 | 302.2 | 35 | 1950 - 1977 |
| Rutland Water Nature Reserve, Leicestershire (with Rutland) | England: Mid | 58 | 262.1 | 8 | 2021 - 2022 |
| Rutland Water, Leicestershire (with Rutland) | England: Mid | 58 | 262.1 | 8 | 2021 - 2022 |
| Petworth Deer Park (NT), West Sussex | England: South | 195 | 515.9 | 85 | 1988 - 2020 |
| Chirk Castle Park (NT), Denbighshire | Wales | 194 | 396.4 | 79 | 1993 - 2018 |
| Wye Valley Woods SAC, Monmouthshire | Wales | 132 | 456.1 | 49 | 1994 - 2018 |
| Little Doward Wood, West Gloucestershire | England: Mid | 80 | 408.8 | 36 | 2004 - 2021 |
| Ashcombe Wood, Surrey | England: South | 20 | 325.0 | 4 | 2022 |
| Rutland Water Nature Reserve, Leicestershire (with Rutland) | England: Mid | 68 | 244.1 | 8 | 2021 - 2022 |
| Ickworth Park NT, West Suffolk | England: South | 176 | 506.8 | 74 | 1986 - 2022 |
| Clumber Park (NT), Nottinghamshire | England: Mid | 177 | 422.0 | 75 | 1990 - 2023 |
| High Park, Blenheim Palace, Oxfordshire | England: South | 261 | 620.3 | 158 | 1950 - 2021 |
| Weald Country Park, South Essex | England: South | 44 | 568.2 | 31 | 2010 |
| Weald Country Park, South Essex | England: South | 128 | 503.1 | 63 | < 2010 |
| Stowe (NT, School and Golf Course), Buckinghamshire | England: South | 142 | 526.8 | 69 | < 2023 |
| Thorndon Park SSSI, South Essex | England: South | 66 | 580.3 | 47 | 2023 |
| Tyntesfield (NT), North Somerset | England: South-West | 61 | 263.9 | 11 | 2010 - 2022 |
| Ashtead Common NNR, Surrey | England: South | 282 | 635.1 | 161 | < 2023 |
| Burnham Beeches, Buckinghamshire | England: South | 263 | 599.6 | 154 | < 2022 |
| Burnham Beeches (inc. Dorneywood NT and Huntswood Farm), Buckinghamshire | England: South | 284 | 640.1 | 175 | < 2022 |
| Bredon Hill, Worcestershire | England: Mid | 218 | 633.9 | 140 | 1970 - 2021 |
Saproxylic Quality Index