Pulborough Brooks is a 160-hectare (400-acre) biological Site of Special Scientific Interest south of Pulborough in West Sussex. It is part of the Pulborough Brooks nature reserve, which is owned and managed by the Royal Society for the Protection of Birds. It is also part of the Arun Valley Ramsar site, Special Area of Conservation and Special Protection Area.
Chanctonbury Hill is an 82.7-hectare (204-acre) biological Site of Special Scientific Interest west of Steyning in West Sussex. Part of it is Chanctonbury Ring, an early Iron Age hillfort which contains two Romano-Celtic temples and which is a Scheduled Monument.
Heathfield and Waldron is a civil parish within the Wealden District of East Sussex, England. Heathfield is surrounded by the High Weald Area of Outstanding Natural Beauty. The parish was formed on 1 April 1999 from "Heathfield" and "Waldron" parishes.
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.
Arlington Reservoir is a 100.4-hectare (248-acre) biological Site of Special Scientific Interest west of Hailsham in East Sussex, England. It is also a Local Nature Reserve and it is owned and managed by South East Water.
Hemingfold Meadow is a 4.9-hectare (12-acre) biological Site of Special Scientific Interest west of Battle in East Sussex.
Paines Cross Meadow is a 3.7-hectare (9.1-acre) biological Site of Special Scientific Interest north-east of Heathfield in East Sussex.
Stockland Farm Meadows is a 5.8-hectare (14-acre) biological Site of Special Scientific Interest south of Crowborough in East Sussex.
Willingford Meadows is a 10.5-hectare (26-acre) biological Site of Special Scientific Interest south-west of Burwash in East Sussex.
Burgh Hill Farm Meadow is a 0.9-hectare (2.2-acre) biological Site of Special Scientific Interest west of Hailsham in East Sussex.
Combe Haven is a 153-hectare (380-acre) biological Site of Special Scientific Interest between Hastings and Bexhill-on-Sea in East Sussex. An area of 18.5 acres is Filsham Reedbed Local Nature Reserve, which is managed by the Sussex Wildlife Trust
Lackford Lakes is a 105.8-hectare (261-acre) biological Site of Special Scientific Interest (SSSI) north and east of Lackford in Suffolk. The SSSI is part of the 131-hectare (320-acre) Lackford Lakes nature reserve, which is managed by the Suffolk Wildlife Trust.
St Dunstan's Farm Meadows is a 10.2-hectare (25-acre) biological Site of Special Scientific Interest south-east of Heathfield in East Sussex. It is in the High Weald Area of Outstanding Natural Beauty.
Holkham Brick Pit is a 0.5-hectare (1.2-acre) geological Site of Special Scientific Interest west of Wells-next-the-Sea in Norfolk. It is a Geological Conservation Review site, and it is in the Norfolk Coast Area of Outstanding Natural Beauty.
Stiffkey Valley is a 44.4-hectare (110-acre) biological Site of Special Scientific Interest east of Wells-next-the-Sea in Norfolk. It is in the Norfolk Coast Area of Outstanding Natural Beauty.
Burton Park SSSI is a 57.7-hectare (143-acre) biological Site of Special Scientific Interest west of Pulborough in West Sussex. A larger area of 63 hectares, including Chingford Pond to the west, is designated a Local Nature Reserve called Burton and Chingford Ponds, which is managed by the Sussex Wildlife Trust and West Sussex County Council. The site is adjacent to Burton Park, a Grade I listed building.
Warblington Meadow is a 3.9-hectare (9.6-acre) biological Site of Special Scientific Interest west of Emsworth in Hampshire.
Little Tew Meadows is a 40-hectare (99-acre) biological Site of Special Scientific Interest east of Chipping Norton in Oxfordshire.
