English: An Experiment from Sunderland At one period, Leeds planned to retain its tramways and convert the central area to subway running, (as has been done in many German cities). Realising that single-deck cars would be needed for the subways, Leeds bought this car second-hand from Sunderland and rebuilt it to give some idea of how the subway idea might work in practice. But changed thinking took over and the subway plan was dropped in favour of converting the tram routes to bus operation, and car No 600, seen here at Thwaite Gate, was relegated to shuttling along the short route to Hunslet.