Monkswood Valley is a 30.7-hectare biological Site of Special Scientific Interest (SSSI) near the village of Cold Ashton, South Gloucestershire, notified in 1990.
Barle Valley is a 1,540 acres (620 ha) Site of Special Scientific Interest within Exmoor National Park, situated in the counties of Devon and Somerset through which the River Barle flows. It was notified in its current form under the Wildlife and Countryside Act in 1988. The site includes the Somerset Wildlife Trust's Mounsey Wood Nature Reserve and the Knaplock and North Barton SSSI which has been notified since 1954.
Swanpool Wood and Furnace Grove is a 13.59-hectare (33.6-acre) biological Site of Special Scientific Interest, in Gloucestershire in South West England. The site is listed in the 'Forest of Dean Local Plan Review' as a Key Wildlife Site (KWS).
Baldersdale Woodlands is a Site of Special Scientific Interest in the Teesdale district of south-west County Durham, England. It consists primarily of ancient, semi-natural woodland growing on steep valley slopes, including scree, on both banks of the River Balder over a stretch of some 3 km, upstream of the village of Cotherstone. The site has a rich faunal assemblage and the woodland and associated stretch of the river is home to a variety of birds, including dipper and goosander.
Sleightholme Beck Gorge – The Troughs is a Site of Special Scientific Interest in the County Durham district of south-west County Durham, England. The site covers a gorge in the valley of Sleightholme Beck between the hamlet of Sleightholme and the confluence with the River Greta, some 3 km upriver from the village of Bowes.
Steeple Point to Marsland Mouth is a coastal Site of Special Scientific Interest (SSSI) in Cornwall, England, UK, noted for its biological characteristics.
Lower Wye Gorge is a 65-hectare (160-acre) biological and geological Site of Special Scientific Interest in Gloucestershire, notified in 1954 and renotified 1987. The site includes two Gloucestershire Wildlife Trust nature reserves being Ban-y-gor Wood and Lancaut. The Natural England citation states a revision for Lancaut inclusion.
Dymock Woods is a 53-hectare (130-acre) biological Site of Special Scientific Interest in Gloucestershire, notified in 1990. The site is listed in the 'Forest of Dean Local Plan Review' as a Key Wildlife Site (KWS).
Upper Wye Gorge is a Site of Special Scientific Interest (SSSI), noted for its biological and geological characteristics, around Symonds Yat in the Wye Valley on the Wales–England border. The site is listed in the 'Forest of Dean Local Plan Review' as a Key Wildlife Site (KWS).
Astridge Wood is a 19.42-hectare (48.0-acre) biological Site of Special Scientific Interest in Gloucestershire, England, notified in 1985. The site is listed in the 'Forest of Dean Local Plan Review' as a Key Wildlife Site (KWS).
Bigsweir Woods is a 48.16-hectare (119.0-acre) biological Site of Special Scientific Interest in Gloucestershire, notified in 1984. The site is listed in the 'Forest of Dean Local Plan Review' as a Key Wildlife Site (KWS).
Bull Cross, The Frith and Juniper Hill is a 42.33-hectare (104.6-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 Regionally Important Geological Site (RIGS).
Highbury Wood is a 50.74-hectare (125.4-acre) biological Site of Special Scientific Interest in Gloucestershire, notified in 1983.
Lineover Wood is a 20.3-hectare (50-acre) biological Site of Special Scientific Interest in Gloucestershire, notified in 1986.
Shorn Cliff And Caswell Woods is a 69.2-hectare (171-acre) biological Site of Special Scientific Interest in Gloucestershire, notified in 1986. The site is listed in the 'Forest of Dean Local Plan Review' as a Key Wildlife Site (KWS).
The Hudnalls is a 94.4-hectare (233-acre) biological Site of Special Scientific Interest in Gloucestershire, notified in 1972. The site is listed in the 'Forest of Dean Local Plan Review' as a Key Wildlife Site (KWS).
Hack Fall Wood, otherwise known as Hackfall, is a Site of Special Scientific Interest, or SSSI, of 44.8687 hectares, lying north-east of the village of Grewelthorpe, North Yorkshire, England. During the 18th century it was landscaped in the picturesque style by landowner William Aislabie, who created views by engineering streams and pools, planting trees and building follies. Turner and Gilpin painted it, and pictures of it featured on Catherine the Great's 1773 Wedgwood dinner service. Some 19th century writers called it "one of the most beautiful woods in the country."
