sentences:  The effect of regional division, mining subsidence along part of the route between Trent and Leeds, and underpowered locomotives meant that its performance was actually inferior in time to that achieved in 1939.In 1962, the Thames–Clyde took eight hours and 50 minutes for the complete journey, leaving London at 10.15, and then calling first at Leicester London Road at 11.52.Further stops were made at Trent and Chesterfield, before reaching Sheffield Midland station at 13.19 and Leeds City at 14.25 - so this latter stage of 39 miles took over an hour as a result of subsidence-induced speed restrictions.