A watching brief on groundworks at the Town Hall and some excavation was carried out by P M G Jones of SCAU for Spelthorne Borough Council. This confirmed that the building lay over medieval and Roman near-shore muds and silts which were sealed below 16th-17th century levels, probably representing foreshore reclamation. A reed peat filled feature of 15th century date was recorded, which contained numerous cut offs of wood and scraps of leather. The earliest buildings on the site appear to be late 15th or 16th century in date. These seem to have been demolished in the late 16th or early 17th century during a general reorganization of the bridgehead area. Subsequently the market hall was built, of which ephemeral traces were recorded. Further south was a range of buildings, one of which was the Kings Arms Inn, separated from the hall by a metalled lane. The inn was demolished when the Town Hall was built in 1872.