The ditch to the town only exists at the NE corner. It is here very marked and must have been on great width; presumably this is the medieval ditch although it may originally have dated from the Roman defences. Considered to be the outer defences of the Roman town though it is only at this point that they survive. Not dated but presumed to be later than the early 2nd century town defences. Now flattened by modern earthmoving associated with the nearby housing estate. Bank can just be seen and the ditch is often visible because of differential growth of grass and weed growth. <1>