Kennet and Lambourn Floodplain is a 23.4-hectare (58-acre) biological Site of Special Scientific Interest in six widely separated areas in the floodplains of the River Lambourn in Berkshire and the River Kennet in Wiltshire, England. It is a Nature Conservation Review site and part of the Kennet and Lambourn Floodplain Special Area of Conservation. One of the areas, Rack Marsh, is managed by the Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust.
Sarratt Bottom nature Reserve in Hertfordshire is a 3.2-hectare (7.9-acre) biological Site of Special Scientific Interest. The site is a meadow beside the River Chess. It is an example of damp grassland which has been traditionally managed for grazing. There are also areas of swamp and marsh. The main plants in grassland areas include sweet vernal grass and meadow foxtail, and marsh horsetail and common spike-rush are common in damper areas. The site has hedgehogs and a wide variety of wetland birds and invertebrates.
Mucking Flats and Marshes is a 311.6 biological Site of Special Scientific Interest east of Tilbury in Essex. It is part of the Thames Estuary and Marshes Ramsar site. and Special Protection Area
Preston Marshes is a 43.4-hectare (107-acre) biological Site of Special Scientific Interest east of Canterbury in Kent.
Holborough Marshes is a 35-hectare (86-acre) nature reserve on the outskirts of Snodland, south-west of Chatham in Kent. It is managed by Kent Wildlife Trust. It is part of Holborough to Burham Marshes Site of Special Scientific Interest.
Rushy Meadows is an 8.9-hectare (22-acre) biological Site of Special Scientific Interest on the western outskirts of Kidlington in Oxfordshire.
Hook Meadow and The Trap Grounds is a 11.9-hectare (29-acre) biological Site of Special Scientific Interest on the northern outskirts of Oxford in Oxfordshire.
Alresford Pond is a 30.2-hectare (75-acre) biological Site of Special Scientific Interest on the north side of New Alresford in Hampshire.
Emer Bog and Baddesley Common is a 50-hectare (120-acre) nature reserve north of North Baddesley in Hampshire. It is managed by the Hampshire and Isle of Wight Wildlife Trust. An area of 39.0 hectares is designated as Baddesley Common biological Site of Special Scientific Interest. An area of 37.6 hectares is designated Emer Bog Special Area of Conservation
Bere Mill Meadows is a 10.3-hectare (25-acre) biological Site of Special Scientific Interest east of Whitchurch in Hampshire.
Bransbury Common is a 158.6-hectare (392-acre) biological Site of Special Scientific Interest south-east of Andover in Hampshire. It is a Nature Conservation Review site, Grade I.
East Aston Common is an 18.2-hectare (45-acre) biological Site of Special Scientific Interest east of Andover in Hampshire.
Eelmoor Marsh is a 66.3-hectare (164-acre) biological Site of Special Scientific Interest between Fleet and Farnborough in Hampshire. It is part of Thames Basin Heaths Special Protection Area for the conservation of wild birds.
Lee-on-The Solent to Itchen Estuary is a 585.9-hectare (1,448-acre) biological and geological Site of Special Scientific Interest which stretches along the coast between Southampton and Gosport in Hampshire. It is a Geological Conservation Review site. It is part of Solent and Southampton Water Ramsar site and Special Protection Area, and of Solent Maritime Special Area of Conservation. Three areas are Local Nature Reserves, Chessel Bay, Hook with Warsash and Mercury Marshes. One area is Hamble Common Camp, a Scheduled Monument.
Lincegrove and Hackett's Marshes is a 37.8-hectare (93-acre) biological Site of Special Scientific Interest on the west bank of the River Hamble between Southampton and Fareham in Hampshire. It is part of Solent and Southampton Water Ramsar site and Special Protection Area, and of Solent Maritime Special Area of Conservation. Hackett's Marsh is a 20.4 hectares Local Nature Reserve.
Moorgreen Meadows is a 14.3-hectare (35-acre) biological Site of Special Scientific Interest in Southampton in Hampshire.
Stockbridge Common Marsh is a 64.8-hectare (160-acre) biological Site of Special Scientific Interest south of Stockbridge in Hampshire. It is owned by the National Trust.
Calshot Marshes is a 51.1-hectare (126-acre) Local Nature Reserve near Calshot, at the junction of The Solent and Southampton Water in Hampshire. It is owned by Hampshire County Council and managed by Hampshire Countryside Service. It is part of Solent and Southampton Water Ramsar site and Special Protection Area, of Solent Maritime Special Area of Conservation and of Hythe to Calshot Marshes Site of Special Scientific Interest.
