We just travelled yesterday from Preston to Penrith North Lakes a journey of approx. 50 mins. No ticket check was made and when we alighted at Penrith we used the underpass which leads directly to a unmanned exit. While usually open it is currently closed with a hand written sign asking us to leave via the main entrance passed the ticket office due to fare evasion.
Fare evasion, or people with off peak return tickets from Lancaster to London, returning and exiting through this exit at Preston, which is perfectly legal, but Virgin don't like it.
Either way Virgin should man the exit and check tickets, not close the exit because they want to make more money (both legally and illegally)