According to legend, it is the site of the last stand by Boudica against the Romans in the year 61. There is no evidence to support this; other theories for the location of the battlefield include Mancetter in Warwickshire and Kings Cross in London. Nevertheless, Ambresbury Banks forms, along with Loughton Camp, Wallbury Camp, Little Hadham, Barkway and Littlebury, a line of hill-forts that arguably delineate the disputed territories of the warring Trinovantes and Catuvellauni.
The fort encircles an area of 4.5 hectares (11 acres) and is surrounded by a single bank of 2 m (6 ft) in height, together with a ditch. There is a small counterscarp bank on the outside lip of the ditch. The defences now have 6 major breaks in their circumference; only one appears to be original. This is approached from the north west by a trapezoidal causeway. The ends of the bank at this point were revetted with coursed puddingstone blocks. The width of the passageway was sufficient to suggest double gates, but no central postholes were found. Finds at the site have included shards of red, grey and black pottery, flints and flint arrow heads, and lumps of baked clay. These suggest a construction date of around 700 BC and occupation until 42 AD.
The area within and around the fort is now completely wooded, although in Iron Age times it would have been cleared of trees to enable a better field of view, and for agriculture. This has been suggested by evidence of wild service trees, which are an indicator of regrown forest.
- "At the Edge archive: Boudica - the case for Atherstone and Kings Cross". Indigogroup.co.uk. 25 November 1995. Retrieved 5 November 2010.
- Ellis, Peter Berresford A Guide to Early Celtic Remains in Britain. London: Constable. 1991
- Historic England. "Ambresbury Banks (369868)". PastScape. Retrieved 10 March 2015.
- "Ambresbury Banks" Archived 2 April 2015 at the Wayback Machine, Unlocking Essex's Past, Seax, Essex County Council. Retrieved 10 March 2015
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