The double decker trains on the southern. The movies I have seen they look really claustrophobic
Operating Cl 37 + coaches on the cumbrian coast line
Laying CWR on lines like the Whitby branch.
Seeing a driver of a Cl 47 on TV wearing a large plastic bag over his legs because the cab was so draughty
Old mechanical signal boxes, albeit converted to colour lights, on the electrified west coast at Atherstone, Polesworth, Stafford, Crewe and Stockport. Some still there.
Booking offices making a single by cutting the corner off a ticket with scissors. As at Leeds with the old NCR ticket machines.
Classic DMU's with paraffin tail lamps.
And this:-