43187 passes St Mary's Crossing signal box on 8 April 2010 with the 1L36 08:31 Cheltenham to Paddington First Great Western service. This Victorian GWR box survives purely to control the minor road crossing leading to a few houses alongside the derelict Thames & Severn Canal, midway between Chalford and Brimscombe. The signalman here gets a lot of exercise, as the white box at ground level contains the signaling instruments, and the crossing gates are manually operated. A real anomaly on a modern main line, where the passage of trains could be interrupted by a 100 year old plus system relying on a key being returned to a machine in a wooden trackside box!