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.
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).
Collinpark Wood is a 66.69-hectare (164.8-acre) biological Site of Special Scientific Interest in Gloucestershire, notified in 1966, revised in 1974 and renotified in 1983. There was a boundary change in 1983. There are seven units of assessment. Unit 1 is a 15-hectare (37-acre) area owned and managed by the Gloucestershire Wildlife Trust. The trust purchased this part of the wood in 1979 with grant aid from WWF. 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).
Nagshead SSSI is a 297 acres (120 ha) biological Site of Special Scientific Interest located within RSPB Nagshead, near Parkend, in the Forest of Dean, Gloucestershire.
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).
Mar Field Fen is a Site of Special Scientific Interest, or SSSI, north of Masham, North Yorkshire, England, in a rural area known as Marfield. It is situated on land containing woodland carr, fen, spring-fed marshy grassland and drier calcareous grassland, between the River Ure to the east and Marfield Wetland nature reserve to the west. As "one of the best examples of fen habitat in the Vale of York," it is a protected habitat for a variety of plants, including the common butterwort, a carnivorous plant. There is no public access to this site.
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. J. M. W. Turner and William Sawrey 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."
Buttermere Fells is a Site of Special Scientific Interest (SSSI) within Lake District National Park in Cumbria, England. The protected area includes many of the hills and mountains between the Buttermere lake valley near the village of Buttermere and the River Derwent valley near the village of Braithwaite. This protected area includes the mountains of Grasmoor, Crag Hill, Causey Pike and Hindscarth. The protected area includes much of the North Western Fells. This protected area contains exceptional examples of montane dwarf shrub heath communities.
Duddon Valley Woodlands is a Site of Special Scientific Interest within the Lake District National Park in Cumbria, England. This protected area comprises eight large patches of woodland along the valley of the River Duddon. The northernmost part of this protected area is near Seathwaite and southern most at Duddon Bridge. This protected area has an exceptional diversity of moss species and also has a population of the common dormouse.
Eden Gorge is a Site of Special Scientific Interest (SSSI) including a 5km length of the valley of the River Eden between Armathwaite and Lazonby in Cumbria, England. This protected area spans between the Settle-Carlisle railway track on the western side to Coombs Wood Forestry Commission site on the eastern side. The protected area includes 30m high cliffs where the River Eden has eroded through New Red Sandstone. The semi-natural woodland is apparently a remnant of the ancient Inglewood forest.
Gelt Woods is a Site of Special Scientific Interest (SSSI) in the valley of the River Gelt. It is located 2km south of Brampton, near the village of Low Geltbridge in Cumbria, England. This protected area includes exceptional gorge woodland at a location where the River Gelt has cut through the New Red Sandstone. The area is protected because of the rare species of moss and liverworts and because of the diversity of woodland bird species. Part of the protected area is owned and managed by the Royal Society for the Protection of Birds.
Gowbarrow Park is a Site of Special Scientific Interest (SSSI) in Lake District National Park in Cumbria, England. It is located on the lower slopes of Gowbarrow Fell and borders Ullswater lake. It is 2 km from the hamlet of Dockray. This protected area has an outstanding diversity of lichen species. Red squirrels have been recorded in this protected area.
Great Wood is a Site of Special Scientific Interest (SSSI) within the Lake District National Park in Cumbria, England. This protected area is located 2km south of Keswick and borders the eastern shore of Derwent Water. This woodland is internationally important because of the diversity of lichens and bryophytes found here.
Helbeck Wood is a Site of Special Scientific Interest (SSSI) in Cumbria, England. It is located near the village of Helbeck, 3km east of Warcop. This wooded protected area is on a scarp slope in the Pennines and has exceptional ash-elm wood on limestone.
Johnny Wood is a Site of Special Scientific Interest (SSSI) within the Lake District National Park in Cumbria, England. It is located 300m west of the village of Borrowdale, in the valley of the River Derwent (Borrowdale). This woodland has an exceptional diversity of liverwort species.
Lodore-Troutdale Woods is a Site of Special Scientific Interest (SSSI) within the Lake District National Park. It is located 4km south of Keswick and 1km east of Grange in the valley of the River Derwent within Borrowdale. The woodland here has an exceptional diversity of moss species.
Milkingstead Wood is a Site of Special Scientific Interest (SSSI) within the Lake District National Park in Cumbria, England. It is located 1km south east of Eskdale Green in the valley of the River Esk (Eskdale). This site is important because of the fern species present.
Miterdale Head Wood is a Site of Special Scientific Interest (SSSI) within the Lake District National Park, in Cumbria, England. It is 3km east of Santon Bridge near Eskdale. This hazel-birch woodland is protected because of its exceptional diversity of moss and liverwort species.
