It helps, obviously, that Basingstoke and Reading are barriered stations and that now Reading West has its swanky new gates at both ends of the station. I hope Mortimer and Bramley-Hampshire follow suit to close off the big gaps in the line there because ultimately fare evasion hurts us all. I've seen people quizzed about how they got onto the station in the first place by GWR operators and it varies in demeanour, and been a fly on the wall to a lot of challenges by the guards on that service. I've heard all the excuses from phone battery (I offered them a charging lead as sockets were installed on 165s mid way through my commuting career!) to someone jumping the gates at Reading. It's quite illuminating and to be honest, you can tell the difference between someone genuinely caught short and the people who actually did it deliberately. Again, I've been in a fly-on-the-wall sort of career for long enough that you can tell a lot from someone's response to a situation.
GWR and SWR do not help themselves.
Last Sunday, barriers were open at Reading at 8:30pm when I arrived back from Oxford. A time when many local and long distance services are still running.
Yesterday at London Paddington, barriers were open on an IET arrival from Plymouth. This was at around noon!
Not one was ticket checked on train. I got on at Earley, and changed at Reading. If I was that way inclined, could of easily of bagged a free journey to London Paddington and back - as the same situation was in reverse gone 9pm.
From what I can see, barriers are usually unmanned from 8pm on a Sunday. The same at some stations on Saturdays too, Bracknell being one example.
How train companies can get stupid over silly amounts by those that have actually paid something for their journey, yet still actively encourage fare evasion by having open and unmanned barriers, is just a joke.