Upwood Meadows is a 6 hectare biological Site of Special Scientific Interest west of Upwood in Cambridgeshire. It is also a National Nature Reserve and a Grade I Nature Conservation Review site. It is managed by the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire.
Wangford Warren and Carr is a 67.8-hectare (168-acre) biological Site of Special Scientific Interest between Brandon and Lakenheath in Suffolk. It is a Nature Conservation Review site, Grade I, and part of the Breckland Special Area of Conservation, and Special Protection Area An area of 15 hectares is managed as a nature reserve by the Suffolk Wildlife Trust
Cornard Mere is an 8.5-hectare (21-acre) biological Site of Special Scientific Interest in Little Cornard in Suffolk. It is managed by the Suffolk Wildlife Trust.
Sizewell Marshes form a 260-acre biological Site of Special Scientific Interest adjacent to Sizewell in Suffolk. It is in the Suffolk Coast and Heaths Area of Outstanding Natural Beauty, and is part of a 356-acre (144-ha) nature reserve managed by the Suffolk Wildlife Trust as Sizewell Belts.
Hopton Fen is a 15.3-hectare (38-acre) biological Site of Special Scientific Interest north of Hopton in Suffolk. It is managed by the Suffolk Wildlife Trust.
Chippenham Fen and Snailwell Poor's Fen is a 155.9-hectare (385-acre) biological Site of Special Scientific Interest south-east of Fordham in Cambridgeshire, England. It is a Nature Conservation Review site, Grade I, a Ramsar wetland site and a Special Area of Conservation. It is managed by Natural England.
Wilbraham Fens is a 62.5-hectare (154-acre) biological Site of Special Scientific Interest east of Cambridge.
River Ise and Meadows is a 13.5-hectare (33-acre) biological Site of Special Scientific Interest along the River Ise in Northamptonshire between Geddington and the Kettering to Corby railway line east of Rushton.
Lakenheath Poor's Fen is a 5.2-hectare biological Site of Special Scientific Interest west of Lakenheath in Suffolk.
Wilde Street Meadow is an 11.6-hectare (29-acre) biological Site of Special Scientific Interest between Lakenheath and Mildenhall in Suffolk, England.
RAF Lakenheath is a 111 hectare biological Site of Special Scientific Interest covering parts of RAF Lakenheath Royal Air Force base, east of Lakenheath in Suffolk. It is in the Breckland Special Area of Conservation.
Stallode Wash, Lakenheath is a 34.1-hectare (84-acre) biological Site of Special Scientific Interest north-west of Lakenheath in Suffolk.
Pakenham Meadows is a 5.8-hectare (14-acre) biological Site of Special Scientific Interest north of Pakenham in Suffolk.
East Walton and Adcock's Common is a 62.4-hectare (154-acre) biological and geological Site of Special Scientific Interest south-east of King's Lynn in Norfolk. It is a Geological Conservation Review site and part of Norfolk Valley Fens Special Area of Conservation
Potter and Scarning Fens, East Dereham is a 6.2-hectare (15-acre) biological Site of Special Scientific Interest south of Dereham in Norfolk. It is part of the Norfolk Valley Fens Special Area of Conservation. Scarning Fen is a Nature Conservation Review site, Grade I, and it is managed by the Norfolk Wildlife Trust.
Middle Harling Fen is a 11.8-hectare (29-acre) biological Site of Special Scientific Interest south of East Harling in Norfolk.
Swangey Fen, Attleborough is a 48.4-hectare (120-acre) biological Site of Special Scientific Interest south-west of Attleborough in Norfolk. It is part of the Norfolk Valley Fens Special Area of Conservation.
Poplar Farm Meadows, Langley is a 7.5-hectare (19-acre) biological Site of Special Scientific Interest east of Loddon in Norfolk. It is part of the Broadland Ramsar site and Special Protection Area, and The Broads Special Area of Conservation.
Great Cressingham Fen is a 14.3-hectare (35-acre) biological Site of Special Scientific Interest near Great Cressingham in Norfolk. It is part of the Norfolk Valley Fens Special Area of Conservation.
