The introduction of redundant 75mph rated coal hoppers onto some Mendip stone workings allowed empty trains to be speeded up on an ad-hoc basis when a suitable locomotive was available. 7C76 was running as 4C76 on 16 July 2019 and passed Wolfhall Junction around 10 minutes early behind 59.203. The 14:39 from Acton TC to Whatley Quarry had knocked another 10 minutes off the schedule by the time it reached Heywood Road Jn.