Robin May:
I'm not sure. They certainly open both sets of doors on the eastbound
District line platform at Barking.

Lawrence Myers:
Yes. That's to allow cross platform interchange to and from both the
Gospel Oak Line, on the left, and Shoeburyness trains on the right.

So do people then cross through the District trains to get between the
Gospel Oak and Shoeburyness lines, too, like at Jamaica station on the
LIRR in New York? Or are their routings such that there would be no
reason to do that anyway?
--
Mark Brader, Toronto | "One thing that surprises you about this business
| is the surprises." -- Tim Baker

My text in this article is in the public domain.