Area B1b coincides with the southern and western part of St John’s Abbey precinct, but not with the assumed site of the abbey church, which should lie further to the east in area B2. This being so, the 2007 evaluation expected to find evidence of ancillary buildings to the abbey.

Only one structure was found that could definitely be associated with the medieval abbey. This comprised the right-angle of wall with a rough stone surface on its west side and a clay floor on its east side (Trench 18). This looked like the south-west corner of a building with an internal clay floor, on the same alignment as the precinct wall. Given its position, this must have been part of the monastic buildings. <1>