It looks like someone has placed their Lima 94xx on their Hornby coaches!

A superb photograph of 7921 " Edstone Hall " looking well turned out on this express passenger duty from Paddington and seen here passing Old Oak , this engine having been shedded at Chester a few years earlier .
The Pannier Tank in the background is on the elevated section of track linking the carriage sidings at Old Oak Common and the Motive Power Depot there with the main line , this section of line being in constant use for empty stock and light engine movements in both directions between those two sites and Paddington station a mile or so up the line