WAller and Beer Woods is a 56.9 hectares biological Site of Special Scientific Interest. off the A372 Othery to Langport road near Aller in Somerset. It was notified in 1952.
WAsham Wood is a 140.6-hectare (347-acre) biological Site of Special Scientific Interest near Downhead in the Mendip Hills, Somerset, notified in 1963.
WBarle 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.
WBoulsbury Wood is a 119.8-hectare (296-acre) biological Site of Special Scientific Interest in Dorset and Hampshire. The site is west of Fordingbridge.
WCheddar Wood is an 86.9-hectare (215-acre) biological Site of Special Scientific Interest at Cheddar in the Mendip Hills, Somerset, England, notified in 1967.
WCleaves 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.
WCleeve Wood, Hanham is a is an 8.9 hectare biological Site of Special Scientific Interest (SSSI) in South Gloucestershire, notified in 1966.
WCogley Wood is a 60.7 hectare biological Site of Special Scientific Interest east of Bruton in Somerset, notified in 1987.
WDendles Wood is an area of protected oak-beech woodland located on the southern edge of Dartmoor, in the English county of Devon. Forming part of the Dartmoor Special Area of Conservation, the wood is also a Site of Special Scientific Interest, and 30 hectares of it has been designated a national nature reserve. It is one of five woodlands within Dartmoor that have been protected as national nature reserves. Dendles Wood and the adjacent Hawns Wood are sometimes known collectively as Hawns and Dendles. The wood supports a variety of flora and fauna, representative of upland oakwoods. In particular, it has a rich variety of moss and lichen, and several breeding bird species.
WEdford Woods and Meadows is a 54.3 hectare biological Site of Special Scientific Interest, between Nettlebridge, Holcombe and Stoke St Michael, Somerset, notified in 1957.
WFivehead Woods and Meadow is a 62.4 hectare biological Site of Special Scientific Interest near the village of Fivehead in Somerset, notified in 1989.
WFolly Farm is a traditionally managed working farm and nature reserve run by the Avon Wildlife Trust. It is located between Stowey, Clutton and Stanton Wick in the civil parish of Stowey in the English county of Somerset.
WGreat Breach and Copley Woods is a 64.8 hectare biological Site of Special Scientific Interest 1 km south of Compton Dundon and 5 km south-east of Street in Somerset, England, notified in 1972.
WHogmoor Inclosure is a large area of wooded heath owned by the British Army. The inclosure is situated 0.5 miles (0.80 km) west from the town of Bordon and within the civil parish of Whitehill in the East Hampshire district of Hampshire, England. The inclosure is used for army training with various tank crossings scattered around the area. The area is historically notable for its connection with the British Army with large barracks surrounding the area.
WHorseshoe Bend, Shirehampton is an 11 acre biological Site of Special Scientific Interest in Bristol, England, on the north bank of a lower, tidal stretch of the River Avon, 1.9 miles (3 kilometres) downstream from the Avon Gorge, and just east of the village of Shirehampton. It was notified as an SSSI in 1999.
WKing's Wood and Urchin Wood SSSI is a 128.1 hectare biological Site of Special Scientific Interest near the villages of Cleeve and Congresbury, North Somerset, notified in 1990.
WLong Dole Wood and Meadows SSSI is a 9.8 hectares biological Site of Special Scientific Interest (SSSI) between the villages of Farrington Gurney and Hinton Blewitt in Bath and North East Somerset, notified in 1987.
WLongleat Woods is a 249.9 hectare biological Site of Special Scientific Interest south of Frome in Somerset, notified in 1972.
WLower Woods is a 280.1-hectare (692-acre) biological and geological Site of Special Scientific Interest near the village of Wickwar, South Gloucestershire, notified in 1966 and renotified in 1985. The site area has increased at last revision in 1974 to a 284.1-hectare (702-acre) site. The site is a nature reserve managed by the Gloucestershire Wildlife Trust.
WMottisfont Bats is a 196.7-hectare (486-acre) biological Site of Special Scientific Interest west of Winchester in Hampshire. It is also a Special Area of Conservation.
WNance Wood is a woodland Site of Special Scientific Interest (SSSI) near Portreath, west Cornwall. The site was first notified in 1951 for its almost pure dwarf, sessile oak coppiced woodland, good bryophyte flora and Irish spurge, which is found in only two localities in Britain.
WThe New Forest is one of the largest remaining tracts of unenclosed pasture land, heathland and forest in Southern England, covering southwest Hampshire and southeast Wiltshire. It was proclaimed a royal forest by William the Conqueror, featuring in the Domesday Book. Pre-existing rights of common pasture are still recognised today, being enforced by official verderers and agisters. In the 18th century, The New Forest became a source of timber for the Royal Navy. It remains a habitat for many rare birds and mammals.
WPencoedtre or Pencoetre, also known as Pencoedtre Village, is a northeastern suburb of Barry in the Vale of Glamorgan, Wales. It borders Gibbonsdown to the southwest and Cadoxton to the south. It has developed from a small farming hamlet into an extensive housing estate in recent years. Pencoedtre Wood is one of the largest areas of woodland in the town, and is a Site of Special Scientific Interest. Pencoedtre Park is located between Pencoedtre and Gibbonsdown.
WPiddles Wood is a small area of woodland south of the River Stour, Dorset, and a Site of Special Scientific Interest (SSSI). The site was notified as an SSSI in 1985. The nearest settlement is the town of Sturminster Newton. The local planning authority is North Dorset District Council and Dorset County Council, but part of the site is managed by the Dorset Naturalists' Trust.
WPostlebury Wood is an 87 hectare biological Site of Special Scientific Interest south of Trudoxhill in Somerset, notified in 1987.
WPrior's Park & Adcombe Wood is a 103.6 hectare biological Site of Special Scientific Interest south of Pitminster in Somerset, notified in 1952.
WRuislip Woods is a Site of Special Scientific Interest and national nature reserve covering 726 acres (294 ha) in Ruislip in the London Borough of Hillingdon. The woods became the second national nature reserve in an urban area of England in May 1997, receiving the Green Flag Award in 2006. Ruislip Local Nature Reserve at TQ 090 899 is part of the national nature reserve.
WSparkford Wood is an 8.4 hectare biological Site of Special Scientific Interest at Sparkford in Somerset, notified in 1954.
WTanner Moor is one of the largest moorlands in Austria with a surface area of 120 hectares. Tanner Moor is a Natura 2000 ecologically protected area located on a high granite plateau in the Freistadt district, Mühlviertel, Upper Austria at an average elevation of 900 m.
WTwinhills Woods and Meadows is a 21.2 hectare biological Site of Special Scientific Interest on the Monarch's Way south of Dulcote in Somerset, notified in 1990.
WWeston Big Wood is a 37.48 hectare woodland west of the town of Portishead, North Somerset, England. It is a nature reserve and biological Site of Special Scientific Interest, notified in 1971. The wood takes its name from the nearby village of Weston-in-Gordano.
WWistman's Wood is one of only three remote high-altitude oakwoods on Dartmoor, Devon, England.
WWyre Forest is a large, semi-natural woodland and forest measuring 26.34 square kilometres (10.17 sq mi) which straddles the borders of Worcestershire and Shropshire, England.
WYarner Wood & Trendlebere Down in Dartmoor, Devon, England is a woodland managed by Natural England. The woodland is part of the East Dartmoor Woods and Heaths National Nature Reserve. The entire area is 777 acres (3.14 km2) while Yarner Wood is 365 acres (1.48 km2). Since 1985 the site has been designated a Site of Special Scientific Interest. Many types of tree grow in Yarner Wood including oak, birch, scots pine, larch and beech. It is home to buzzards, sparrow hawks, nightjars and pied flycatchers.