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 2019, it has 33,000 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.
Smokejack Clay Pit is a 56-hectare (140-acre) geological Site of Special Scientific Interest east of Cranleigh in Surrey. It is a Geological Conservation Review site.
High Rocks is a 3.2-hectare (7.9-acre) geological Site of Special Scientific Interest west of Tunbridge Wells in East Sussex and Kent. It is a Geological Conservation Review site.
Southerham Grey Pit is a 8.5-hectare (21-acre) geological Site of Special Scientific Interest south-east of Lewes in East Sussex. It is a Geological Conservation Review site.
Penn's Rocks is a 10.2-hectare (25-acre) biological Site of Special Scientific Interest north of Crowborough in East Sussex.
Hastingford Cutting is a 0.04-hectare (0.099-acre) geological Site of Special Scientific Interest south of Crowborough in East Sussex. It is a Geological Conservation Review site.
Eridge Green is a 8.4-hectare (21-acre) biological Site of Special Scientific Interest north-east of Crowborough in East Sussex. It is part of the 44 hectares Eridge Rocks nature reserve, which is managed by Sussex Wildlife Trust.
Stone Farm Rocks or Stone Hill Rocks is a 0.6-hectare (1.5-acre) geological Site of Special Scientific Interest south of East Grinstead in West Sussex. It is a Geological Conservation Review site.
Chalkney Wood is a 72.6-hectare (179-acre) biological Site of Special Scientific Interest south-east of Earls Colne in Essex, England. 25 hectares is owned by Essex County Council and 48 hectares by Forestry England.
Mill Meadows, Billericay is a 6.7-hectare (17-acre) biological Site of Special Scientific Interest (SSSI) in Billericay in Essex, England. It is part of the 36.8 hectare Mill Meadows Local Nature Reserve (LNR), which is owned and managed by Basildon District Council.
Pembury Cutting and Pit is a 1.6-hectare (4.0-acre) geological Site of Special Scientific Interest east of Tunbridge Wells in Kent. It is a Geological Conservation Review site.
Tower Hill to Cockham Wood is a 47.8-hectare (118-acre) biological and geological Site of Special Scientific Interest on the northern outskirts of Rochester in Kent. It contains two Geological Conservation Review sites.
Cowden Meadow is a 1.1-hectare (2.7-acre) biological Site of Special Scientific Interest east of Cowden in Kent.
Wretton SSSI is a 20.6-hectare (51-acre) geological Site of Special Scientific Interest north-east of Downham Market in Norfolk. It is a Geological Conservation Review site.
Old Lodge is a 103.1-hectare (255-acre) Local Nature Reserve west of Crowborough in East Sussex. It is privately owned. It is managed by Sussex Wildlife Trust. It is part of Ashdown Forest, which is a Nature Conservation Review site, Grade I, a Special Area of Conservation, a Special Protection Area and a Site of Special Scientific Interest.
Warnham SSSI is a 28.5-hectare (70-acre) geological Site of Special Scientific Interest north of Horsham in West Sussex. It is a Geological Conservation Review site.
Freshfield Lane is a 17-hectare (42-acre) geological Site of Special Scientific Interest east of Haywards Heath in West Sussex. It is a Geological Conservation Review site.
Upper Greensand Hangers: Empshott to Hawkley is a 37.7-hectare (93-acre) biological Site of Special Scientific Interest north of Petersfield in Hampshire. It is part of the East Hampshire Hangers Special Area of Conservation.
Upper Greensand Hangers: Wyck to Wheatley is a 13.2-hectare (33-acre) biological Site of Special Scientific Interest east of Alton in Hampshire. It is part of the East Hampshire Hangers Special Area of Conservation.
