This is the largest remaining area of heath in the Breckland, and it has a history of use for sheep grazing and as a rabbit warren from the thirteenth century, and continuing until the Second World War.

There are several rare lichens and plants, and over fifty species of breeding birds.

[8] Part of the site is common land with a right of public access.

[9] The most important use of the Warren, dating back to at least the 14th-century, was keeping rabbits.

During the 19th century, the rabbit population decreased as the Warren became increasingly popular as a game reserve.