Trial Trench COPA were commissioned by Fusion to undertake an archaeological evaluation at HS2 2017 Construction Land Requirement, Windmill Hill LS093/94 (Project Plan for Trial Trench Investigations at Windmill Hill (LS093/94) and Southam (LS122) ; Fusion 2017b; Document No. 1EW03-FUS-EV-REP-CS07CL24002689). The archaeological monitoring of the excavation of Mitigation Ponds 1-7 and 9-12 revealed no deposits of archaeological interest and no finds were observed in the topsoil during the course of the fieldwork. Of the eight trial trenches only two, Trenches 3 and 6, revealed any deposits of archaeological interest. In Trench 3 a north-west/south-east orientated ditch (303) was excavated. This ditch was 1. 10m in width and 0. 58m in depth with a v-shaped profile. It produced a single fragment of post-medieval ceramic building material (CBM) and cut through the subsoil (301) suggesting a relatively modern date. This field boundary is visible as a sub-division of the field on the 1886 Edition OS map. Trench 6 revealed evidence of three furrows on a north-west/south-east alignment as indicated by anomalies in the geophysical survey. Two of these (603 and 605) were sample excavated and one (607) was left unexcavated. 603 measured 2. 95m wide and 0. 20m deep while 605 measured 2. 67m wide and 0. 12m deep. Both had straight sides and a flat base. No artefactual material was recovered from either of the interventions into the furrows.
Sam Bithell (Mon,) studied this question.