Ash to Brookwood Heaths is a 1,576.3-hectare (3,895-acre) biological Site of Special Scientific Interest west of Guildford in Surrey. It is a Nature Conservation Review site, Grade I. It is part of the Thames Basin Heaths Special Protection Area and the Thursley, Ash, Pirbright and Chobham Special Area of Conservation. An area of 1,392 hectares is managed as a nature reserve by the Surrey Wildlife Trust.
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. The site is managed by the Essex Wildlife Trust
Hedgecourt is a 33.6-hectare (83-acre) biological Site of Special Scientific Interest west of Felbridge in Surrey. An area of 5-hectare (12-acre) is managed by the Surrey Wildlife Trust.
Dogsthorpe Star Pit is a 36.4-hectare (90-acre) biological Site of Special Scientific Interest (SSSI)) on the eastern outskirts of Peterborough in Cambridgeshire. It is also designated a Local Nature Reserve, and it is managed by the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire.
Gamlingay Wood is a 48.4-hectare (120-acre) biological Site of Special Scientific Interest (SSSI) north of Gamlingay in Cambridgeshire. It is managed by the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire.
Roswell Pits is an 8 hectare nature reserve on the eastern outskirts of Ely in Cambridgeshire. It is managed by the Environment Agency. It is part of the Ely Pits and Meadows Site of Special Scientific Interest (SSSI)) and Geological Conservation Review site. The SSSI designation for both biological and geological interest. The site was formerly managed by the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire.
Sandhurst to Owlsmoor Bogs and Heaths is an 85.8-hectare (212-acre) biological Site of Special Scientific Interest (SSSI) on the northern outskirts of Sandhurst in Berkshire. Part of the SSSI is Wildmoor Heath nature reserve, which is managed by the Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust. and the SSSI is part of Thames Basin Heaths Special Protection Area.
Waltham Abbey SSSI is a 34.2-hectare (85-acre) biological Site of Special Scientific Interest which is located within the Waltham Abbey Royal Gunpowder Mills at Waltham Abbey in Essex.
Frays Farm Meadows is a 28.2-hectare (70-acre) biological Site of Special Scientific Interest near Denham in the London Borough of Hillingdon. It was notified as an SSSI in 1981, and has been managed by the London Wildlife Trust on behalf of Hillingdon Council since 1999. It is part of the Colne Valley Regional Park.
Mid Colne Valley is a 132 hectare biological Site of Special Scientific Interest in Harefield in the London Borough of Hillingdon and Denham in South Buckinghamshire. Its main importance lies in its extensive diversity of birdlife in lakes in former gravel pits.
Blo' Norton and Thelnetham Fens are a 21.3-hectare (53-acre) biological Site of Special Scientific Interest (SSSI) on the Norfolk/Suffolk border. Blo' Norton Fen is in the parish of Blo' Norton in Norfolk and Thelnetham Fen is in Thelnetham parish in Suffolk. It is a Nature Conservation Review site, Grade 2, and part of the Waveney and Little Ouse Valley Fens Special Area of Conservation, Thelnetham Fen is managed by the Suffolk Wildlife Trust and Blo' Norton Fen by the Little Ouse Headwaters Project (LOHP).
An area of 39.1 hectares in the north-west corner of Geddington Chase has been designated a biological Site of Special Scientific Interest (SSSI). It is located south-east of Corby in Northamptonshire.
Cranford St John SSSI is a 2.8-hectare (6.9-acre) geological Site of Special Scientific Interest in Cranford St John, east of Kettering in Northamptonshire. It is a Geological Conservation Review site.
Leighfield Forest SSSI is an 11.3 hectares biological Site of Special Scientific Interest east of Skeffington in Leicestershire, England. It consists of several fragments, including Tugby Wood, Loddington Reddish, Brown's Wood, Skeffington Wood and Tilton Wood, of the former medieval hunting Leighfield Forest, which straddles Leicestershire and Rutland. It is a Nature Conservation Review site, Grade II.
River Eye SSSI is a 6.0 hectares biological Site of Special Scientific Interest covering a stretch of the River Eye between Ham Bridge, north-west of Stapleford, and the eastern outskirts of Melton Mowbray in Leicestershire. It is a Nature Conservation Review site.
Sproxton Quarry is a 5.4 hectares geological Site of Special Scientific Interest north-east of Sproxton in Leicestershire. It is a Geological Conservation Review site.
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.
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.
