A friend of mine wasn't quite by himself in an EPB compartment where he claims to have joined the 4'6'' club.....
4'6" club? What happened to the other 2½ inches?
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I have an odd non-corridor memory from the Southern Region in the early 1980s.
A friend and I travelled from Datchet on the W&E Riverside branch towards Waterloo one Sunday afternoon. There was no ticket office open at Datchet so we assumed we might have to buy tickets on the train. When the train arrived it was a 4-EPB (or maybe the last of the 4-SUBs) and we ended up in an empty non-corridor compartment. "Guess we pay at the other end", we thought. However at Sunnymeads a conductor-guard with ticket machine and cash bag bounded into our compartment and sold us both tickets. At the next station, Wraysbury, he quickly jumped out and went to another compartment to repeat the process.
It could be scary enough travelling in these non-corridor compartments as a passenger at quiet times, but it seemed like a particularly hazardous job doing the Paytrain thing, jumping between sealed compartments with a bag of cash to try to sell tickets to passengers who might not be too keen to pay.