Or is it?This site is a very good example of the problems "castle hunters" face.On the face of it,a large mound,up to 10 feet high,above the surrounding land level,ditched all round,still wet for 1/4 of the ditch length,but one famous site says conclusively,backed by evidence,that it's a castle site,whilst the ORDNANCE SURVEY shows the site on it's maps as a "mill mound".
and see http://www.castleuk.net/castle_lists_east_anglia/167/brentcastle.htm
In the first reference,it states the site is distant from local housing,but villages have largely disappeared from rural life.Lots of examples of village drift.So that would in itself,prove nothing.
Baileys can be ploughed out,never exist in the first instance,i.e.adulterine mottes.(lots of these).