Wessex Archaeology was commissioned by Morrison Water Services Ltd, to undertake an archaeological watching brief during the excavation of 7 Trial Pits at Bourton-on-the-Water Sewage Treatment Works and Rissington Road, Bourton-on-the-Water, Gloucestershire, GL52 2PD, located at NGR 418205 219998 and 417939 219782. Due to challenging ground conditions, only three of the Trial Pits (TP 5, 6 & 7) were excavated and the remaining four Test Pits (TP 1. 2, 3 & 4) were replaced with boreholes which were not monitored. The watching brief comprised the observation of all mechanical and hand excavations within the investigation area. The watching brief identified no archaeological features although an undated made ground deposit was revealed in one of the monitored Trial Pits. In addition to the made ground, natural alluvial deposits were encountered in two of the Trial Pits.