Blenheim Park is a 224.3-hectare (554-acre) biological Site of Special Scientific Interest on the outskirts of Woodstock in Oxfordshire. It occupies most of the grounds of Blenheim Palace.
Knole Park is a 383.4-hectare (947-acre) biological Site of Special Scientific Interest in Sevenoaks in Kent. About 43 acres of the park belongs to the National Trust, as does Knole House, which sits within it. The remaining parkland is privately owned by the Knole Estate. It is in the Kent Downs Area of Outstanding Natural Beauty.
Chipstead Downs is a 157.8-hectare (390-acre) biological Site of Special Scientific Interest south-east of Banstead in Surrey, England. Part of it is Park Downs, which is managed by the Banstead Commons Conservators.
Hackhurst and White Downs is a 185.1-hectare (457-acre) biological Site of Special Scientific Interest west of Dorking in Surrey. White Downs is a Nature Conservation Review site, Grade 2, and part of it is in the 200-hectare (490-acre) White Downs nature reserve, which is owned by the Wotton Estate and managed by the Surrey Wildlife Trust (SWT). Hackhurst Downs is a 29.9-hectare (74-acre) Local Nature Reserve, which part of the 40-hectare (99-acre) Hackhurst Downs nature reserve, which is owned by Surrey County Council and also managed by the SWT.
Whitmoor Common is a 166-hectare (410-acre) biological Site of Special Scientific Interest on the northern outskirts of Guildford in Surrey. It is part of the Thames Basin Heaths Special Protection Area and the 184.9-hectare (457-acre) Whitmoor and Rickford Commons Local Nature Reserve, which is owned by Surrey County Council and managed by the Surrey Wildlife Trust.
Woldingham and Oxted Downs is a 128.4-hectare (317-acre) biological Site of Special Scientific Interest east of Caterham in Surrey.
Blow's Down is a 33.1-hectare (82-acre) biological Site of Special Scientific Interest in Dunstable in Bedfordshire. It was notified in 1989 under Section 28 of the Wildlife and Countryside Act 1981, and the local planning authority is Central Bedfordshire Council. The site forms around half of the 62.3-hectare (154-acre) Blow's Downs nature reserve, which is managed by the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire.
Lewes Brooks is a 339.1-hectare (838-acre) biological Site of Special Scientific Interest south of Lewes in East Sussex. The Falmer-Glynde and the Ouse valleys meet in Lewes Brooks, and the Upper and Lower Rises are the remains of the chalk uplands eroded by the Ouse.
Cheesefoot Head is a large natural amphitheatre and beauty spot just outside Winchester, England. It is situated on the A272 road. There are three bowl barrows on the site. The east, south and west walls of the amphitheatre are a 13.4-hectare (33-acre) biological Site of Special Scientific Interest (SSSI).
Hackpen, Warren & Gramp's Hill Downs is a 71.4-hectare (176-acre) biological Site of Special Scientific Interest in Letcombe Bassett in Oxfordshire.
Arundel Park is a 134-hectare (330-acre) biological Site of Special Scientific Interest north of Arundel in West Sussex.
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.
Aston Upthorpe Downs is a 38.5-hectare (95-acre) biological Site of Special Scientific Interest south of Aston Upthorpe in Oxfordshire. It is a Nature Conservation Review site, Grade I.
Weston Fen is a 14-hectare (35-acre) biological Site of Special Scientific Interest north of Weston-on-the-Green in Oxfordshire.
Otmoor SSSI is a 213-hectare (530-acre) biological Site of Special Scientific Interest north of Oxford in Oxfordshire. It is adjacent to RSPB Otmoor, and they are both part of Otmoor, an area of wetland and wet grassland which was enclosed in the early nineteenth century.
Swyncombe Downs is a 47.1-hectare (116-acre) biological Site of Special Scientific Interest east of Wallingford in Oxfordshire. Part of it is an Iron Age hillfort, Wyfold Castle, which is a Scheduled Monument.
Reed Hill is a 14-hectare (35-acre) biological Site of Special Scientific Interest (SSSI) west of Stonesfield in Oxfordshire. It partly overlaps Stonesfield Slate Mines SSSI.
Rushmore and Conholt Downs is a 111.5-hectare (276-acre) biological Site of Special Scientific Interest north of Andover in Hampshire. It is a Nature Conservation Review site, Grade I.
Sugworth is a 0.6-hectare (1.5-acre) geological Site of Special Scientific Interest north of Abingdon-on-Thames in Oxfordshire. It is a Geological Conservation Review site.
