On Nov 23, 1:27 pm, Tristan Miller
wrote:
And if I meet a ticket inspector on the train to Liverpool Street, they're
just going to take my word that I boarded at Maryland rather than, say,
Shenfield (or some other Zone 3 station without barriers)? That seems
rather open to abuse.

It's not a question of "take your word for it". You have a valid
ticket for where the ticket inspector found you. If you had a paper
ticket from Maryland to Liverpool Street, wouldn't the same question
arise?

--
Abi