In my experience, the later/latest trains from Manchester back to Preston/Blackpool are not the kind of trains a guard should venture through!
I agree, I was out with a group of friends and had the misfortune of travelling on the last (I think) TPex service from Deansgate to Bolton. It was packed, the group got split up with most cramming in the middle car and myself and another squeezing into the rear door vestibule of the rear car. There was no way a guard could have come through anyway as it was totally crammed.
We get to Bolton and all hell breaks loose, people are spilling out of the centre car onto the platform and there is a massive fight between someone from our group and some nasty looking bloke. I legged it down and tried to do my part in separating the pair meanwhile the train left as soon as possible.
It turned out the fight started because it was so cramped that the nasty sort was taking advantage of the situation and feeling up my mates missus, naturally he didn't take kindly too it and did what any bloke would do (especially on the last train on a Saturday night).
I find it ironic though as if we wound the clock back to pre-privatisation days perhaps BR would have ran a relief with extra carriages so it would never have been cramped anyway but I digress.
As for late night security, has anyone tried catching the nightbus from Piccadilly Gardens on a Friday & Saturday night? They have security monitoring the boarding of the buses, some are ok others are just meatheads who should probably be working doors at a crap pub. That said once the bus has left the city centre the driver is on his own & the amount of tosspots on the night bus never ceases to amaze me. I don't like travelling on it, the amount of brawls I've seen or ended up being involved in is unbelievable.
Regarding ticket checks on the trains, I have seen them late at night up here. It depends on how busy the train is, if the guard can get through then he tends to try. I've noticed that Wigan Wallgate now has RPI's working an "imaginary gate" which stops the need of the guard from doing tickets until after the next station call. I had also seen them carried out occasionally on very late night London-Brighton services (southern) though this was a few years ago.
I have the utmost respect for people who work late night services be it Train, bus or Tube as the amount of crap they have to deal with is totally unbelievable.
Phil