Cleaves Wood is a 40.38 hectare biological Site of Special Scientific Interest (SSSI) near the village of Wellow in Bath and North East Somerset, notified in 1988.
Hinton Charterhouse Field is a 0.32 hectare biological Site of Special Scientific Interest (SSSI) near the village of Hinton Charterhouse in Bath and North East Somerset, notified in 1991.
Shiplate Slait is a 33.9 hectare biological Site of Special Scientific Interest near the village of Loxton, within the Mendip Hills Area of Outstanding Natural Beauty, North Somerset, notified in 1987.
Axbridge Hill and Fry's Hill is a 64.8-hectare (160-acre) biological Site of Special Scientific Interest in the Mendip Hills, Somerset, notified in 1990. The hills are above the town of Axbridge, immediately to the east of Shute Shelve Hill.
Chancellor's Farm is a 34.2-hectare biological Site of Special Scientific Interest just north of Priddy in the Mendip Hills, Somerset, notified in 1984.
Purn Hill is a 6.1 hectare biological Site of Special Scientific Interest near the village of Bleadon, Somerset, notified in 1990. The site is a small promontory of Carboniferous Limestone projecting southward from the main Mendip ridge.
St. Dunstan's Well Catchment is a Site of Special Scientific Interest, covering 39.8 hectares near Stoke St Michael in the Mendip Hills, Somerset, England. The site was notified in 1967. It is of both geological and biological significance.
Catcott, Edington and Chilton Moors SSSI is a 1083 hectare biological Site of Special Scientific Interest in Somerset, England notified in 1967. It is close to the villages of Edington and Catcott.
Windsor Hill Marsh is a 0.84 hectare biological Site of Special Scientific Interest, north of the town of Shepton Mallet in Somerset, and adjacent to the Windsor Hill Quarry geological Site of Special Scientific Interest. It was notified in January 1972.
Hardington Moor is an 8.7 hectare biological Site of Special Scientific Interest between Hardington Mandeville and West Coker in Somerset, notified in 1994.
Barrington Hill Meadows is a 16.1 hectare biological Site of Special Scientific Interest in Somerset, England, notified in 1987.
Exmoor Coastal Heaths is a 1758.3 hectare biological Site of Special Scientific Interest in Devon and Somerset, notified in 1994.
Ruttersleigh is a 97 hectares biological Site of Special Scientific Interest between Buckland St Mary and Staple Fitzpaine on the north-facing slope of the Blackdown Hills. in Somerset, notified in 1991.
Cleeve Hill is a 15.1 hectare biological Site of Special Scientific Interest between Old Cleeve and Watchet in Somerset, notified in 1989.
Whitevine Meadows is a 13.0 hectare biological Site of Special Scientific Interest east of North and South Perrott in Somerset, notified in 1979.
Ashridge Commons and Woods is a 640.1 hectare biological Site of Special Scientific Interest in Buckinghamshire and Hertfordshire. It is located in Little Gaddesden, and is part of the National Trust Ashridge Estate in the Chilterns Area of Outstanding Natural Beauty.
Rodborough Common is a 116.0-hectare (287-acre) biological and geological Site of Special Scientific Interest in Gloucestershire, notified in 1954. The site is listed in the ‘Stroud District’ Local Plan, adopted November 2005, Appendix 6 as an SSSI and a Regionally Important Geological Site (RIGS). The Common is also a Special Area of Conservation (SAC) under the EU Habitats Directive
Rough Bank, Miserden is a 9.2-hectare (23-acre) biological Site of Special Scientific Interest in Gloucestershire, notified in 1986. It was purchased by the wildlife charity Butterfly Conservation in 2012.
Racecourse Farm Fields is a 5 hectare biological Site of Special Scientific Interest in Easton on the Hill in Northamptonshire.
Donington Park is a 32.9 hectare biological Site of Special Scientific Interest west of Castle Donington in Leicestershire. It is separate from the nearby Donington Park motorsport circuit.
