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.
Kempton Park Reservoirs are a Site of Special Scientific Interest in the London Borough of Hounslow and Kempton Park in Surrey. It is owned by Thames Water. It is part of South West London Waterbodies Ramsar site and Special Protection Area Kempton Park East reservoir is also a local nature reserve.
Woolbeding and Pound Commons is a 171.9-hectare (425-acre) biological Site of Special Scientific Interest north of Midhurst in West Sussex.
Bolter End is a hamlet 5 mi (8.0 km) to the west of High Wycombe in Buckinghamshire, England.
The Cornmill Stream and Old River Lea is a 24.6-hectare (61-acre) biological Site of Special Scientific Interest in Waltham Abbey, Essex.
Aston Rowant National Nature Reserve is located on the north-west escarpment of the Chiltern Hills, in the Chilterns Area of Outstanding Natural Beauty. It has an area of 159.1 hectares, and most of it is a 128.5 hectares biological Site of Special Scientific Interest. It is listed as a Grade 1 site in A Nature Conservation Review. The reserve is in several sections, mostly in the parish of Lewknor in Oxfordshire, with smaller sections in the parish of Stokenchurch in Buckinghamshire.
Ellesborough and Kimble Warrens is a 68.9-hectare (170-acre) biological Site of Special Scientific Interest in Ellesborough in Buckinghamshire. The local planning authority is Wycombe District Council. It is part of the Chilterns Area of Outstanding Natural Beauty.
Gomm Valley is a 4.1-hectare (10-acre) biological Site of Special Scientific Interest in Micklefield, a district of High Wycombe in Buckinghamshire. It is managed by the Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust and is part of the Chilterns Area of Outstanding Natural Beauty. The local planning authority is Wycombe District Council.
Hollowhill and Pullingshill Woods is a 23-hectare biological Site of Special Scientific Interest near Marlow in Buckinghamshire. It is in the Chilterns Area of Outstanding Natural Beauty, and the Chilterns Beechwoods Special Area of Conservation. The local planning authorities are Wycombe District Council and Buckinghamshire County Council. Pullingshill Wood is owned by the Woodland Trust, and Hollowhill Wood was formerly owned by Buckinghamshire County Council, but was transferred to the Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust. Since November 2015 the 7.8-hectare site has been managed by the Trust as "Hog and Hollowhill Woods".
Lodge Hill is a 31.8-hectare (79-acre) Site of Special Scientific Interest north of Bledlow Ridge in Buckinghamshire. The local planning authorities are Wycombe District Council and Buckinghamshire County Council. The site is in the Chilterns Area of Outstanding Natural Beauty, and The Ridgeway long-distance footpath crosses it.
Millfield Wood is a 9.5-hectare (23-acre) biological Site of Special Scientific Interest north of High Wycombe in Buckinghamshire. It is owned and managed by the Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust, and it is in the Chilterns Areas of Outstanding Natural Beauty.
Moorend Common is a 28-hectare (69-acre) Site of Special Scientific Interest in the hamlet Moor End, west of High Wycombe in Buckinghamshire. It is in the Chilterns Areas of Outstanding Natural Beauty, and it is owned and managed by Lane End Parish Council.
Widdenton Park Wood is a 23.5-hectare (58-acre) Site of Special Scientific Interest west of High Wycombe in Buckinghamshire. It is on the site of a medieval deer park going back to the fourteenth century, and most of it is in the Chilterns Area of Outstanding Natural Beauty.
Frieth Meadows is a 2.5-hectare (6.2-acre) Site of Special Scientific Interest in Frieth in Buckinghamshire. It is in the Chilterns Area of Outstanding Natural Beauty.
Wormsley Chalk Banks are six separate areas which together are a 14.1-hectare (35-acre) biological Site of Special Scientific Interest near Turville in Buckinghamshire and Oxfordshire. The site is in the Chilterns Area of Outstanding Natural Beauty.
Aston Rowant Woods is a 209.7-hectare (518-acre) biological Site of Special Scientific Interest near Aston Rowant in Oxfordshire and Buckinghamshire. Part of it is in Aston Rowant National Nature Reserve, and a large part is in the Chiltern Beechwoods Special Area of Conservation. The site is also in the Chilterns Area of Outstanding Natural Beauty.
Aldwincle Marsh is a 2-hectare (4.9-acre) biological Site of Special Scientific Interest north of Thrapston in Northamptonshire.
Down Bank is a 5.9-hectare (15-acre) biological Site of Special Scientific Interest south-west of Canterbury in Kent.
Cothill Fen is a 43.3-hectare (107-acre) biological and geological Site of Special Scientific Interest north-west of Abingdon-on-Thames in Oxfordshire. It is a Special Area of Conservation and parts of it are a Geological Conservation Review site, a Nature Conservation Review site, Grade 1, and a National Nature Reserve. It also includes two areas which are nature reserves managed by the Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust, Lashford Lane Fen and Parsonage Moor.
