In message , at 11:24:03 on
Tue, 15 Jan 2013, David Walters remarked:
davros.org lists Marble Arch as having a fixed stairway.

That confirms my recollection (a stairway alongside one of the
escalators, but not at the same angle so it's succession of half a dozen
steps, landing etc)

Is that a safety thing? If you slip you will stop at the next landing
rather than tumbling all the way to the bottom. It seems rare to find
very long unbroken flights of stairs.

It's because the natural 'angle' of escalators and stairs are different,
due to the different step dimensions. The landings are needed to keep
the two in synch.

Maybe the list you need is the inverse of the "only escalator" one
(assuming lifts are either OK, or always accompanied by stairs).

Lifts aren't okay though, I want to be able to find routes that don't
involve mechanical aids between the platform and street.

OK, I thought it was about carrying dogs (which ought to be able to sit
in a lift), but thanks for clarifying the requirement.
--
Roland Perry