The Sussex Wildlife Trust (SWT) is a conservation charity which aims to protect natural life in Sussex. It was founded in 1961 and is one of 46 wildlife trusts across the UK and the Isle of Man and Alderney. As of 2024, it had 38,000 members and manages 2,000 hectares of land for nature. It is a registered charity and in the year to 31 March 2019 it had an income of £5.7 million and expenditure of £4 million, resulting in net income of £1.7 million.
Great Cheverell Hill is a 33.2 hectare biological Site of Special Scientific Interest at Great Cheverell in Wiltshire, notified in 1971.
Park Gate Down or Parkgate Down is a 7-hectare (17-acre) biological Site of Special Scientific Interest south-east of Stelling Minnis in Kent. It is also a Special Area of Conservation and is managed by the Kent Wildlife Trust,
Ash to Brookwood Heaths is a 1,576.3-hectare (3,895-acre) biological Site of Special Scientific Interest west of Guildford in Surrey. It is a Nature Conservation Review site, Grade I. It is part of the Thames Basin Heaths Special Protection Area and the Thursley, Ash, Pirbright and Chobham Special Area of Conservation. An area of 1,392 hectares is managed as a nature reserve by the Surrey Wildlife Trust.
Sheepleas is a 99.9-hectare (247-acre) biological and geological Site of Special Scientific Interest east of Guildford in Surrey. It is a Geological Conservation Review site and a Local Nature Reserve. It is owned by Surrey County Council and managed by the Surrey Wildlife Trust.
Stones Road Pond is a 0.5-hectare (1.2-acre) biological Site of Special Scientific Interest (SSSI) in Epsom in Surrey.
Little Heath Pit is a 0.3-hectare (0.74-acre) geological Site of Special Scientific Interest at Little Heath near Potten End in Hertfordshire. It is part of the Ashridge Estate, owned by the National Trust, and the local planning authority is Dacorum Borough Council. It is listed in the Geological Conservation Review.
Breckland Farmland is a 13,392.4 hectare biological Site of Special Scientific Interest (SSSI) in many separate areas between Swaffham in Norfolk and Bury St Edmunds in Suffolk. It is part of the Breckland Special Protection Area under the European Union Directive on the Conservation of Wild Birds.
Burbage Wood and Aston Firs is a 51.1-hectare (126-acre) biological Site of Special Scientific Interest in Leicestershire.
Alkham, Lydden and Swingfield Woods is a 228.3-hectare (564-acre) biological Site of Special Scientific Interest north-west of Dover in Kent. Alkham Valley Woods is a Nature Conservation Review site, Grade I.
Medway Estuary and Marshes is a 4,748.8-hectare (11,735-acre) biological Site of Special Scientific Interest which stretches along the banks of the River Medway between Gillingham and Sheerness in Kent. It is a Nature Conservation Review site, Grade I, a Ramsar internationally important wetland site, and a Special Protection Area under the European Union Directive on the Conservation of Wild Birds. Part of the land area designated as Medway Estuary and Marshes SSSI is owned by the Church Commissioners.
Park Wood is a 31.1-hectare (77-acre) biological Site of Special Scientific Interest west of Chilham in Kent.
Thanet Coast is an 816.9-hectare (2,019-acre) biological and geological Site of Special Scientific Interest which stretches along the coast between Whitstable and Ramsgate in Kent. It is a Geological Conservation Review site, and overlaps two Special Area of Conservations. It is also part of a Ramsar Site and a Special Protection Area. Part of it is a Local Nature Reserve,
Peter's Pit is a 28.7-hectare (71-acre) biological Site of Special Scientific Interest north-east of Snodland in Kent. It is a Special Area of Conservation
Thursley, Hankley and Frensham Commons is a 1,878.5-hectare (4,642-acre) biological Site of Special Scientific Interest west of Godalming in Surrey. Thursley and Hankley Commons are Nature Conservation Review sites, Grade I. An area of 115.1 hectares is a local nature reserve called The Flashes and an area of 180 hectares is the Elstead Group of Commons, a nature reserve managed by the Surrey Wildlife Trust. Thursley Common is a national nature reserve. An area of 265.7 hectares is the Thursley & Ockley Bogs Ramsar site. The site is a Special Protection Area and part of the Thursley, Ash, Pirbright & Chobham Special Area of Conservation. Part of the land area designated as Thursley, Hankley and Frensham Commons SSSI is owned by the Ministry of Defence.
Sheep's Banks is a 5.1-hectare (13-acre) biological Site of Special Scientific Interest north of Wootton in Oxfordshire.
Bentley Station Meadow is a 5.2-hectare (13-acre) biological Site of Special Scientific Interest south of Bentley in Hampshire.
Bramshott and Ludshott Commons is a 374.4-hectare (925-acre) biological Site of Special Scientific Interest near Grayshott in Hampshire. It is part of Wealden Heaths Phase II Special Protection Area.
Broxhead and Kingsley Commons is a 105.1-hectare (260-acre) biological Site of Special Scientific Interest north of Lindford in Hampshire. It is part of Wealden Heaths Phase II Special Protection Area for the Conservation of Wild Birds and Broxhead Common is a 41.8-hectare (103-acre) Local Nature Reserve owned and managed by Hampshire County Council. Part of the land area designated Broxhead and Kingsley Commons SSSI is owned by the Ministry of Defence.
