Wangford Warren and Carr is a 67.8-hectare (168-acre) biological Site of Special Scientific Interest between Brandon and Lakenheath in Suffolk.

[1][2] It is a Nature Conservation Review site, Grade I,[3] and part of the Breckland Special Area of Conservation,[4][5] and Special Protection Area[6][7] An area of 15 hectares is managed as a nature reserve by the Suffolk Wildlife Trust[8] The site includes the "best preserved system of active sand dunes in Breckland".

[9] This habitat is described by the Joint Nature Conservation Committee as Inland dunes with open Corynephorus and Agrostis grasslands and is the only site of this kind in the United Kingdom.

[9] The fen and carr areas include species such as purple moor grass Molinia cerulean, willow, alder and silver birch.

[9] The site is an example of colonization processes, showing the sequence from bare sand to heathland.