66593 and 66551 worked 7A40, the 08:40 Merehead Quarry to Hanwell Bridge Loop stone train, east from Hungerford across the common on 26 January 2024. At Hanwell Bridge 66593 would detach and run into the headshunt, the train would be split and 66551 would depart for Neasden with the front portion. 66593 would then return, couple to the rear portion and take that to Acton.