In message , at 13:06:40 on Sat,
10 Sep 2005, Clive remarked:
There's no reason why the escalators can't be from a different part of
the platforms to the current booking hall, is there?

The current booking hall is tiny. It's basically a corridor around the
liftshaft, at street level. Very similar to Russell Square, or Goodge
St.

There's no spare footprint for the top of a set of escalators.
--
Roland Perry