Nene Washes is a 1,522-hectare (3,760-acre) biological Site of Special Scientific Interest on the bank of the River Nene east of Peterborough in Cambridgeshire. It is also a Ramsar internationally important wetland site, a Special Area of Conservation, a Special Protection Area and a Nature Conservation Review site. An area of 280 hectares is managed by the Royal Society for the Protection of Birds. The total area of the Ramsar site is 1,517 hectares.
Castor Hanglands is an 89.8-hectare (222-acre) biological Site of Special Scientific Interest west of Peterborough in Cambridgeshire. The site is also a National Nature Reserve, and it is a Nature Conservation Review site, Grade I for its woodlands and Grade 2 for its grassland. It is common land managed by Natural England.
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.
Cam Washes is a 166.5-hectare (411-acre) biological Site of Special Scientific Interest west of Wicken in Cambridgeshire.
Berry Fen is a 15.3-hectare (38-acre) biological Site of Special Scientific Interest on the western outskirts of Earith in Cambridgeshire.
Sprat's Water and Marshes, Carlton Colville is a 57.1-hectare (141-acre) biological Site of Special Scientific Interest on the western outskirts of Lowestoft in Suffolk, England. It is part of the Broadland Ramsar internationally important wetland site, and Special Protection Area under the European Union Directive on the Conservation of Wild Birds, and part of The Broads Special Area of Conservation. The northern part of the site is Carlton Marshes, which is part of Carlton and Oulton Marshes, a nature reserve managed by the Suffolk Wildlife Trust.
Lakenheath Warren is a 588.3-hectare (1,454-acre) biological Site of Special Scientific Interest south-east of Lakenheath in Suffolk, England. It is a Nature Conservation Review site, Grade I, and part of Breckland Special Area of Conservation and Breckland Special Protection Area under the European Union Directive on the Conservation of Wild Birds. The RAF Lakenheath base is located nearby.
Maidscross Hill is a 44.8-hectare (111-acre) biological Site of Special Scientific Interest on the eastern outskirts of Lakenheath in Suffolk. It is a Nature Conservation Review site, Grade I, and larger area of 49.8 hectares is a Local Nature Reserve.
Lakenheath Poor's Fen is a 5.2-hectare biological Site of Special Scientific Interest west of Lakenheath in Suffolk.
Pashford Poor's Fen, Lakenheath is a 12.4-hectare (31-acre) biological Site of Special Scientific Interest east 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.
Staverton Park and The Thicks, Wantisden is an 80.8-hectare (200-acre) biological Site of Special Scientific Interest west of Butley in Suffolk. It is a Nature Conservation Review site, Grade I, and a Special Area of Conservation. It is in the Suffolk Coast and Heaths Area of Outstanding Natural Beauty.
West Stow Heath is a 44.3-hectare (109-acre) biological Site of Special Scientific Interest west of West Stow in Suffolk. It is part of the Breckland Special Protection Area under the European Union Directive on the Conservation of Wild Birds.
Crag Pit, Sutton is a 0.7-hectare (1.7-acre) biological Site of Special Scientific Interest north of Shottisham in Suffolk. It is in the Suffolk Coast and Heaths Area of Outstanding Natural Beauty.
Lount Meadows is a 8.5 hectares biological Site of Special Scientific Interest south of Lount in Leicestershire, England.
Wymondham Rough is a 6.0 hectares biological Site of Special Scientific Interest (SSSI) east of Stapleford in Leicestershire. The SSSI is part of the 12.5 hectare Wymondham Rough nature reserve, which is managed by the Leicestershire and Rutland Wildlife Trust.
Castle Acre Common is a 17.8-hectare (44-acre) biological Site of Special Scientific Interest east of King's Lynn in Norfolk.
