Just a couple of irrelevent observations from when I did a "Great Escape" day the other week...
First at Stourbridge Junction, the lady on the 139 was more than happy to talk about the PPM and tell tales of the hundreds of people who come specifically to see it; apparently not just
spotters enthusiasts but also engineering students. She was cheerful and friendly; despite (I would imagine) having to more or less say the same thing every 10 minutes!
Second, the guard on a service from Stratford on Avon played a blinder. There were two lads sat behind me who were clearly re-using discarded tickets. One had an outbound part of a return ticket, but not the return part which he insisted he'd thrown away. It was clear from the ticket that it had been bought on the train around 9am that day; it was around 5pm by now. The other had a "biroed" ticket, and when asked where he'd bought it, he complained of suffering from "short term memory loss".
The guard said he would call BTP and put them off the train at the next stop. When we arrived at [dunno, somewhere in the middle of nowhere] he opened the doors and (what I consider to be the master stroke) tipped the driver to turn the engines off; we all sat there in silence for about a minute while the driver stood on the platform calling the BTP.
When the two lads in question went out onto the platform to remonstrate (and maybe also to escape wrath of the other passengers who their actions were delaying), he reached in and closed the doors so they couldn't get back on! They gave up and we were on our way a few minutes later.
I can't think of any train where I didn't get my ticket checked, often by the same guard (as on a run out to Hereford) who remarked "oh it's you again"