An archaeological watching brief was undertaken during the excavation of an exploratory trench on the south-west elevation of the Town Hall. The Town Hall is a Grade II listed building erected in 1832, Its construction had occasioned considerable re-development of the market place area and its enlargement to the south-west. The excavation of the trench was to assess whether or not water was seeping from ground level into the cellar and basements below the extension to the Town Hall that was constructed in 1877. The exploratory trench was excavated by hand and all intrusive groundwork was conducted under continuous archaeological supervision. The excavation revealed modern layers associated with the laying of a block pavement and the insertion of a vent pipe, this latter in the early 21st century. The outer face of the walling for the cellar was also revealed. No archaeological features or deposits were revealed or disturbed by the trenching and there were no finds or artefacts of any archaeological significance uncovered as a result of the excavation.