At one of the infamous level crossings.

Graham Moore says "I think this could be the gasworks shunt, as from the shadow of the buffers, the sun is behind the engine, so in the east. Every morning an engine, usually an M7, would leave Poole yard with empty wagons, proceed a short way up the main line and shunt the gasworks sidings, returning with wagons loaded with coke, and some tar wagons."