Coronation Street, possible Roman stones

Stones displaying Lewis holes (for the lifting devices of Roman cranes), chisel facing and drill holes were noticed by the Northern Archaeology Group decorating the roundabout at the junction of Mill Dam, Commercial Road, Station Road, Coronation Street and Ferry Street in 1998. Several dozen similar stones border the flowerbeds at one side of the carpark in Coronation Street.
NB re-evaluation of photos of the stones in 2022 suggests that there is nothing distinctively Roman about them. The stones have been removed and their present location is unknown.