"k" wrote in message
...

How can you get that far without already having passed through
barriers?

Maybe they enter at Bank, maybe they got on at Burnt Oak, where the
ticket office is seldom open and the barriers seldom closed...

But surely they should have "touched in" even if the gates are open.

How can they legitimately be at Bank without having touched in
somewhere?

As Robin says, by using the mobility-impaired lift down to the DLR
platforms.

DJ.