MIG wrote:
No, the person with the £20 was showing evidence of deliberate
fare-evasion, and should have been prosecuted, risking a fine of £1000
or gaol or whatever is. Plenty of people have been prosecuted when
this sort of routine behaviour is observed.

Depends on the destination, on a train to London Bridge, for example,
means you'll pay when you get there as there are barriers on the way
out.

Most of this week a gripper has come through the 7:02 from High Brooms
to CHX, asking if anyone needs a ticket (not asking to check tickets
though). He wasn't there today.