Salisbury Plain is a chalk plateau in the south western part of central southern England covering 300 square miles (780 km2). It is part of a system of chalk downlands throughout eastern and southern England formed by the rocks of the Chalk Group and largely lies within the county of Wiltshire, but stretches into Hampshire.
Beacon Hill is near the village of Burghclere and Watership Down, in north Hampshire. The hill's name is derived from the fact that it was one of many Beacon Hills in England and beyond. This hill was once the site of the most famous beacon in Hampshire. It is 261 metres high and has one of England's most well known hill forts on its slopes, visible from the main A34 road which passes close by. From there, outstanding views of the surrounding area and much of Hampshire may be obtained. The site is open to the public and managed by Hampshire County Council. It is an 80.7-hectare (199-acre) biological Site of Special Scientific Interest called Burghclere Beacon and a Nature Conservation Review site, Grade I.
Bratton Downs is a 395.8 hectare biological and geological Site of Special Scientific Interest in Wiltshire, England, near the villages of Bratton and Edington, and about 3 miles (5 km) east of the town of Westbury. It was notified in 1971. The designated area consists mainly of chalk grassland, as well as some ancient woodland, and supports a diverse range of native flora and fauna. It overlays notable geological features—principally landforms created by glaciation in the Pleistocene.
Camp Down is a 7.3-hectare (18-acre) biological Site of Special Scientific Interest in Wiltshire in South West England. It was designated as such in 1965.
Bowerchalke Downs, is a 134 hectares biological Site of Special Scientific Interest in southern Wiltshire, England, notified in 1971.
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.
Great Cheverell Hill is a 33.2 hectare biological Site of Special Scientific Interest at Great Cheverell in Wiltshire, notified in 1971.
Ham Hill is an area of chalk downland in Wiltshire, England, on the steep banks running alongside the road from the village of Ham to Buttermere, close to the Berkshire border. A biological Site of Special Scientific Interest, notified in 1971, covers 1.5 hectares of the site; this designation is due to the site's species-rich plant and insect communities, which include some rare species. Notable among these is the musk orchid, which has been confirmed at only one other site in Wiltshire.
The Folkestone Downs are an area of chalk downland above Folkestone, where the eastern end of the North Downs escarpment meets the English Channel. Part of the Downs is the Folkestone to Etchinghill Escarpment Site of Special Scientific Interest, designated for its geological and biological interest.
Chalk heath is a rare habitat, in the temperate grasslands, savannas, and shrublands biome, formed of a paradoxical mixture of shallow-rooted calcifuge ("calcium-hating") and deeper-rooted calcicole ("calcium-loving") plants, growing on a thin layer of acidic soil over an alkaline substrate. Chalk heath is intermediate between two much more widespread habitats, chalk grassland and heathland.
Scratchbury Camp is the site of an Iron Age univallate hillfort on Scratchbury Hill, overlooking the Wylye valley about 1 km northeast of the village of Norton Bavant in Wiltshire, England. The fort covers an area of 37 acres (15 ha) and occupies the summit of the hill on the edge of Salisbury Plain, with its four-sided shape largely following the natural contours of the hill.
Leckhampton Hill and Charlton Kings Common is a 63.8-hectare (158-acre) biological and geological Site of Special Scientific Interest in Gloucestershire, notified in 1954. There are five units of assessment.
Minchinhampton Common is a 182.7-hectare (451-acre) biological and geological Site of Special Scientific Interest in Gloucestershire, notified in 1972.
Old River Severn, Upper Lode is a 3.72-hectare (9.2-acre) biological Site of Special Scientific Interest in Gloucestershire, notified in 1985. It is a cross county border site between Gloucestershire and Herefordshire and Worcestershire.
Puckham Woods is a 32.38-hectare (80.0-acre) biological Site of Special Scientific Interest in Gloucestershire to the east of Cheltenham near Whittington, notified in 1954. The site is listed in the 'Cotswold District' Local Plan 2001-2011 as a Key Wildlife Site (KWS).
Range Farm Fields is a 12.8-hectare (32-acre) biological Site of Special Scientific Interest in Gloucestershire, near to Gloucester City, notified in 1996.
Rodborough Common is a 116.0-hectare (287-acre) biological and geological Site of Special Scientific Interest in Gloucestershire, notified in 1954. The site is listed in the ‘Stroud District’ Local Plan, adopted November 2005, Appendix 6 as an SSSI and a Regionally Important Geological Site (RIGS). The Common is also a Special Area of Conservation (SAC) under the EU Habitats Directive
Tudor Farm Bank is a 3.68-hectare (9.1-acre) biological Site of Special Scientific Interest in Gloucestershire, notified in 1999.
Ivinghoe Hills is a 210.4 hectares Site of Special Scientific Interest in Ivinghoe in Buckinghamshire, and part of the Chilterns Area of Outstanding Natural Beauty. It is listed in A Nature Conservation Review. The Ridgeway long-distance footpath ends and the Icknield Way Path starts in the site on Ivinghoe Beacon. An Iron Age fort on Ivinghoe Beacon and a tumulus on Gallows Hill are Scheduled Monuments. The site is part of the National Trust's Ashridge Estate, apart from a small area which belongs to Buckinghamshire County Council.
Beeding Hill to Newtimber Hill is a 321-hectare (790-acre) biological and geological Downland Site of Special Scientific Interest (SSSI) north of Shoreham-by-Sea in West Sussex. It is a Nature Conservation Review site, Grade 2, and it includes Devil's Dyke Geological Conservation Review site.
