Weldon Park is a 51.7-hectare (128-acre) biological Site of Special Scientific Interest east of Weldon in Northamptonshire.
Blow's Down is a 33.1-hectare (82-acre) biological Site of Special Scientific Interest in Dunstable in Bedfordshire. It was notified in 1989 under Section 28 of the Wildlife and Countryside Act 1981, and the local planning authority is Central Bedfordshire Council. The site forms around half of the 62.3-hectare (154-acre) Blow's Downs nature reserve, which is managed by the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire.
Woodwalton Marsh is a 0.8-hectare (2.0-acre) biological Site of Special Scientific Interest north-east of Woodwalton in Cambridgeshire. It is managed by the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire.
Holland Hall (Melbourn) Railway Cutting is a 3.3-hectare (8.2-acre) biological Site of Special Scientific Interest near Melbourn in Cambridgeshire. It is the verge of a kilometre long stretch of an operational railway line, the Cambridge Line.
Mill Crook is a 5.9-hectare (15-acre) biological Site of Special Scientific Interest east of Towcester in Northamptonshire. Mill Crook and Grafton Regis Meadow are a 7.9-hectare (20-acre) nature reserve managed by the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire.
Roade Cutting is a 15.2-hectare (38-acre) geological Site of Special Scientific Interest along the West Coast Main Line north from Roade in Northamptonshire. It is a Geological Conservation Review site.
Ditchford Lakes and Meadows is a 31.1-hectare (77-acre) nature reserve Northamptonshire. It is managed by the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire. It is part of the Upper Nene Valley Gravel Pits Site of Special Scientific Interest, Ramsar wetland site of international importance, and Special Protection Area under the European Communities Birds Directive.
River Ise and Meadows is a 13.5-hectare (33-acre) biological Site of Special Scientific Interest along the River Ise in Northamptonshire between Geddington and the Kettering to Corby railway line east of Rushton.
Stoke and Bowd Lane Woods is a 36.4-hectare (90-acre) biological Site of Special Scientific Interest west of Corby in Northamptonshire. The eastern half of Stoke Wood is managed by the Woodland Trust, a triangular area of 0.7 hectares which stretches south from the middle is the Stoke Wood End Quarter, a nature reserve managed by the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire, and the remaining western part of the wood is private property. Bowd Lane Wood is private property.
Barford Wood and Meadows or Barford Meadow Nature Reserve is a 36 hectare nature reserve east of Rushton in Northamptonshire. It is managed by the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire. The north-eastern end is part of the River Ise and Meadows Site of Special Scientific Interest.
Aldwincle Marsh is a 2-hectare (4.9-acre) biological Site of Special Scientific Interest north of Thrapston in Northamptonshire.
High Wood and Meadow is a 16.5-hectare (41-acre) biological Site of Special Scientific Interest between Farthingstone and Preston Capes in Northamptonshire. It is managed by the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire.
Birch Spinney and Mawsley Marsh is a 12.3-hectare (30-acre) biological Site of Special Scientific Interest north-west of Broughton in Northamptonshire.
Bugbrooke Meadows is a 10.1-hectare (25-acre) biological Site of Special Scientific Interest east of Nether Heyford in Northamptonshire. One of the fields with an area of 1.7 hectares is managed by the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire.
Syresham Marshy Meadows is a 17.8-hectare (44-acre) biological Site of Special Scientific Interest west of Silverstone in Northamptonshire.
Glapthorn Cow Pasture is a 28.2-hectare (70-acre) biological Site of Special Scientific Interest north-west of Oundle in Northamptonshire. It is managed by the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire.
Lineage Wood & Railway Track, Long Melford is a 78.7-hectare (194-acre) biological Site of Special Scientific Interest north-east of Long Melford in Suffolk.
