I too noticed this. It was also annoying how they referred to the yellow light as amber but I suppose that's just being picky.
The part where they drove a loco out a depot, did that really happen?
'Robbery' was filmed in Theddingworth, Leicestershire.
Sometime during the planning stages, the loco was said to have been started up, then driven along a siding at Euston Station, at around midnight.
Apparently, the robbers didn't know how to stop it and they jumped off the moving loco, which potentially could have caused a very nasty accident !
I wonder if it passed a red signal or two, before it ran out of momentum ?
I bet there were a few puzzled rail staff when they discovered the loco some distance away from where it had originally been stabled