Archaeological monitoring was undertaken to excavate and record any archaeological deposits which were exposed by the groundworks. A CAT archaeologist supervised the excavation of: 1) foundation trenching totalling 20.4m long and 0.5m wide, which was excavated to a depth of 0.7-0.8m. 2) a service trench totalling 20m long and 0.4-0.5m wide, which was excavated to a depth of c 0.6m. Archaeological monitoring was carried out at 47 Irvine Road, Colchester, Essex, during groundworks for a detached single-storey room at the far end of the garden. A post-medieval ditch aligned north to south was excavated and appears to be part of a field boundary ditch seen on early OS maps.
Hicks et al. (Tue,) studied this question.