The watching brief monitored the stripping of all topsoils and overburden within the A350 Chippenham Bypass improvement groundworks until it is established that the potential for surviving archaeological remains has been exhausted. In addition, four machine-excavated test pits were monitored within the section south of Chequers roundabout on the north-bound side, to a depth of 400 mm below present levels, at evenly-spaced approximate chainage-measurements of 140 m, 185 m, 230 m and 275 m. Three machine-excavated test pits were also monitored within the section east of Chequers Roundabout to a depth of 900 mm below present levels. The watching brief identified a limited number of archaeological features within the site, with Romano-British ditches revealed to the north of Chequers Roundabout, undated ditches to the north of Cepen Park Roundabout, along with a probable post-medieval well and trackway.