Pewsey Downs is a 305.3 hectare biological Site of Special Scientific Interest on the southern edge of the Marlborough Downs north of Pewsey in Wiltshire, notified in 1951. It includes the Pewsey Downs National Nature Reserve.
Pevensey Levels is a 3,603.2-hectare (8,904-acre) biological Site of Special Scientific Interest between Bexhill-on-Sea and Hailsham in East Sussex. It is a Nature Conservation Review site, Grade I, a Ramsar site and a Special Area of Conservation. An area of 183.5 hectares is a national nature reserve and an area of 150 hectares is a nature reserve called Pevensey Marshes which is managed by the Sussex Wildlife Trust.
Glover's Wood is a 74.5-hectare (184-acre) biological Site of Special Scientific Interest east of Charlwood in Surrey. It is a Nature Conservation Review site, Grade 2.
Staffhurst Wood is a 51-hectare (130-acre) biological Site of Special Scientific Interest south of Oxted in Surrey. It is a Nature Conservation Review site, Grade 2. An area of 38.1 hectares is a Local Nature Reserve, which is owned by Surrey County Council.
Castor Hanglands is an 89.8-hectare (222-acre) biological Site of Special Scientific Interest west of Peterborough in Cambridgeshire. The site is also a National Nature Reserve, and it is a Nature Conservation Review site, Grade I for its woodlands and Grade 2 for its grassland. It is common land managed by Natural England.
Lewes Downs is a 165-hectare (410-acre) biological Site of Special Scientific Interest east of Lewes in East Sussex. It is a Nature Conservation Review site, Grade I and a Special Area of Conservation. Part of it is a national nature reserve, part is Malling Down nature reserve, which is managed by the Sussex Wildlife Trust, and part is Mount Caburn, an Iron Age hill fort which is a Scheduled Monument.
Amberley Wild Brooks or Amberley Wildbrooks is a 327.5-hectare (809-acre) biological Site of Special Scientific Interest west of Storrington in West Sussex. An area of 80 hectares is a nature reserve managed by the Sussex Wildlife Trust It is a Site of Special Scientific Interest and a Nature Conservation Review site. It is also part of the Arun Valley Ramsar site, Special Area of Conservation and Special Protection Area.
Castle Hill is a 114.6-hectare (283-acre) biological Site of Special Scientific Interest on the eastern outskirts of Brighton in East Sussex. It is a Special Area of Conservation and Nature Conservation Review site. The northern half is a national nature reserve
Ebernoe Common is a 233.9-hectare (578-acre) biological Site of Special Scientific Interest in Ebernoe, north of Petworth in West Sussex. It is a Nature Conservation Review site, Grade I, a national nature reserve and a Special Area of Conservation. It is managed by the Sussex Wildlife Trust
Roydon Common is a 194.9-hectare (482-acre) biological Site of Special Scientific Interest east of King's Lynn in Norfolk. It is also a Grade I Nature Conservation Review site, a National Nature Reserve and a Ramsar site. It is part of the Roydon Common and Dersingham Bog Special Area of Conservation and Roydon Common and Grimston Warren nature reserve, which is managed by the Norfolk Wildlife Trust,
Barnham Cross Common is a 69.1-hectare (171-acre) biological Site of Special Scientific Interest on the southern outskirts of Thetford in Norfolk. It is owned by Thetford Town Council and is registered common land. It is also a Local Nature Reserve and a Nature Conservation Review site, Grade 1. It is part of the Breckland Special Area of Conservation and Special Protection Area.
Duncton to Bignor Escarpment is a 229-hectare (570-acre) biological Site of Special Scientific Interest west of Pulborough in West Sussex. It is a Special Area of Conservation and Bignor Hill is a Nature Conservation Review site, Grade I.
Harting Downs is a 336.3-hectare (831-acre) biological Site of Special Scientific Interest west of Midhurst in West Sussex. It is a Nature Conservation Review site, Grade I and an area of 206.6 hectares is a Local Nature Reserve which is owned and managed by the National Trust.
The Mens is a 205.2-hectare (507-acre) biological Site of Special Scientific Interest west of Billingshurst in West Sussex. It is a Nature Conservation Review site, Grade I and a Special Area of Conservation. An area of 166 hectares south of the A272 road is managed as a nature reserve by the Sussex Wildlife Trust.
Parham Park SSSI is a 263.3-hectare (651-acre) biological Site of Special Scientific Interest in the grounds of Parham Park, west of Storrington in West Sussex. It is a Nature Conservation Review site, Grade 2.
Heyshott Down is a 42.6-hectare (105-acre) biological Site of Special Scientific Interest south of Midhurst in West Sussex. It is a Nature Conservation Review site, Grade 2.
Malling Down is an 85-hectare (210-acre) nature reserve on the eastern outskirts of Lewes in East Sussex. It is managed by the Sussex Wildlife Trust. It is part of Lewes Downs, which is a Nature Conservation Review site, Grade I. Special Area of Conservation and Site of Special Scientific Interest.
Port Meadow with Wolvercote Common and Green is a 167.1-hectare (413-acre) biological Site of Special Scientific Interest in Oxford in Oxfordshire. It is a Nature Conservation Review site, Grade I, and part of Oxford Meadows Special Area of Conservation. The remains of Godstow Abbey, which is a Scheduled Monument, are in the north of the site.
Lymington River SSSI is a 34.8-hectare (86-acre) biological and geological Site of Special Scientific Interest along Lymington River and its tributaries between Lymington, Burley and Stoney Cross in Hampshire. HIghland Water is a Geological Conservation Review site and Ober Water is a Nature Conservation Review site, Grade I. Parts of the site are in The New Forest and Solent and Southampton Water Ramsar sites, and in The New Forest Special Protection Area.
