Mal it's an old scrubber if you'll pardon the expession. Car PW (Permanent Way) 8 was a cut down double decker (Car 505) that BCT had gained from the takeover of the City of Birmingham Tramways Company. Converted in 1920 it was used to tour the system with grinding stones underneath to keep the track smooth for service cars. Seen here in Camp Hill it was possibly returning to Kyotts Lake works off Stratford Road.
Mike
I should have known better than to try and fool you.......Mal