Fleet Pond is a 48.3-hectare (119-acre) biological Site of Special Scientific Interest in Fleet in Hampshire. It is also a Local Nature Reserve.
Knole Park is a 383.4-hectare (947-acre) biological Site of Special Scientific Interest in Sevenoaks in Kent. About 43 acres of the park belongs to the National Trust, as does Knole House, which sits within it. The remaining parkland is privately owned by the Knole Estate. It is in the Kent Downs Area of Outstanding Natural Beauty.
Ingrebourne Marshes are a 74.8 hectare biological Site of Special Scientific Interest in Hornchurch in the London Borough of Havering. Ingrebourne Valley Local Nature Reserve includes a small part of the SSSI west of the River Ingrebourne.
Ockham and Wisley Commons is a 266-hectare (660-acre) biological Site of Special Scientific Interest east of Woking in Surrey. It is also a Local Nature Reserve and part of the Thames Basin Heaths Special Protection Area. It is part of the slightly larger area of 297-hectare (730-acre) Wisley & Ockham Commons & Chatley Heath nature reserve, which is owned by Surrey County Council and managed by the Surrey Wildlife Trust.
Stones Road Pond is a 0.5-hectare (1.2-acre) biological Site of Special Scientific Interest (SSSI) in Epsom in Surrey.
Stanmore Common is a 49.2-hectare public park, Local Nature Reserve and Site of Metropolitan Importance for Nature Conservation in Stanmore in the London Borough of Harrow in England. It is owned by Harrow Council and managed by the council with a local group. It was a biological Site of Special Scientific Interest, but was de-notified in the early 1990s.
Amwell Quarry or Amwell Nature Reserve is a 37 hectare biological Site of Special Scientific Interest in Great Amwell in Hertfordshire. The planning authority is East Hertfordshire District Council. It is also part of the Lee Valley Ramsar Site and Special Protection Area, and is owned and managed by the Hertfordshire and Middlesex Wildlife Trust.
Thorley Wash or Thorley Flood Pound is a 17.3-hectare biological Site of Special Scientific Interest in Thorley, south of Bishop's Stortford in Hertfordshire. It was formerly a flood pound for the Stort Navigation, which was decommissioned in 2004 and converted to a more natural state. It was purchased by the Herts and Middlesex Wildlife Trust from the Environment Agency in 2011.
Sundon Chalk Quarry is a 26.2-hectare (65-acre) biological Site of Special Scientific Interest in Upper Sundon in Bedfordshire. It was notified in 1989 under Section 28 of the Wildlife and Countryside Act 1981, and the local planning authority is Central Bedfordshire Council. The site is privately owned but there is free public access.
Aston Clinton Ragpits is a 2.9-hectare (7.2-acre) biological Site of Special Scientific Interest in Aston Clinton in Buckinghamshire. It is a former chalk quarry, which is now a nature reserve managed by the Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust. It is in the Chilterns Area of Outstanding Natural Beauty.
Dancersend Waterworks is a 4-hectare biological Site of Special Scientific Interest in Spencersgreen south of Aston Clinton in Buckinghamshire. It was formerly a private waterworks supplying the Rothschild Dancersend estate, and is now owned by Thames Water. It is in the Chilterns Area of Outstanding Natural Beauty. A cooling pond within the Thames Water site is a Grade II listed building.
Pitsea Marsh is a 94.6-hectare (234-acre) Site of Special Scientific Interest in Pitsea in Essex. The southern half is the Wat Tyler Country Park, and the northern half is private land.
West Wood is a 23.6 hectares biological Site of Special Scientific Interest in Little Sampford, north of Thaxted in northwestern Essex. It is owned and managed by the Essex Wildlife Trust.
Buchan Hill Ponds is a 19.5-hectare (48-acre) biological Site of Special Scientific Interest on the south-west outskirts of Crawley in West Sussex.
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.
Forest Mere is a 14.6-hectare (36-acre) biological Site of Special Scientific Interest north of Midhurst in West Sussex.
St Leonard's Forest SSSI is an 85.4-hectare (211-acre) biological Site of Special Scientific Interest east of Horsham in West Sussex. The SSSI is in two separate areas, with the western part being in the 289-hectare (710-acre) Forestry Commission managed St Leonard's Forest.
Bramshill is a 673.3-hectare (1,664-acre) biological Site of Special Scientific Interest near Bramshill, northeast of Basingstoke in Hampshire. It is part of Thames Basin Heaths Special Protection Area for the conservation of wild birds.
Foxlease and Ancells Meadows is a 68.8-hectare (170-acre) biological Site of Special Scientific Interest on the western outskirts of Farnborough in Hampshire.The site is in seven areas, two of which are nature reserves managed by the Hampshire and Isle of Wight Wildlife Trust, Ancells Farm and Whitehouse Meadow.
Titchfield Haven is a 134.5-hectare (332-acre) biological Site of Special Scientific Interest north-west of Gosport in Hampshire. Most of it is a local nature reserve and a national nature reserve. It is part of Solent and Southampton Water Ramsar site and Special Protection Area.
