A watching brief was maintained by G Beresford, for Priestmere Properties, on the redevelopment of this site within the bailey of Reigate Castle, following an evaluation in 1994. The construction of the new building on piles meant that ground disturbance was limited, but evidence for a medieval rubble layer was recorded. Observation of works for a new access drive revealed a spur to the moat that is shown on 19th century maps. This feature was sealed below the bank adjoining the existing moat, demonstrating that at this point at least the bank is modern.