A watching brief was carried out during the excavation of a trench to replace a stretch of wall which forms the north boundary of the car park of Grey Friars Adult Community College. One 450mm-wide trench was dug by contractors along the existing wall line. The depth of the trench was 1.9m. It was dug in sections, shored, and then filled with concrete. Five visits were made by a CAT archaeologist. It was not possible to enter the trench whilst unshored, although it was possible to inspect the parts of the trench sides not obscured by shoring panels. No archaeological remains were observed. <1>