In article , Neil Williams
writes
Canary Wharf does, as well. Coincidentially, this is a new station
which is built in a style not totally different from Washington's
excellent system.

It's probably relevant that many Tube stations were built with lifts
only and the escalators were retrofitted wherever they'd go in.

There's also a geology issue. Most Tube lines were dug in the blue clay
layer, so a large station excavation would require cutting out vast
amounts of hard rock above that. Canary Wharf is one of the exceptions
(the hole was already there and just had to have a roof put over it). In
that part of London big open boxes turn out to work better than
traditional layouts.

Canning Town station has escalators in the open air, and of course
Greenford's emerges on an open-air platform.

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