In message , at 00:28:41 on Mon,
12 Sep 2005, John Rowland
remarked:

That's fairly easy - the wheelchair access would
be via a new lift installed in place of the existing
ones (on which site would also
presumably be the existing emergency stair exit).

And would that street entrance have to be permanently manned?

I don't know. There's a disabled-lift-only exit somewhere in the Bank
complex, I think. Is that manned?

Does the existing lift go from street level to platform level?

It starts at street level, but would probably need
extending down a little to reach the platform.
Almost every tube station of that type has
a corridor, then stairs, down to platform level.
But this would be
easier than sinking a complete new shaft.

... assuming that the existing lift shaft extended would not foul the
running tunnels, and would come down between them with enough room either
side for level access. It would surprise me if this were true.

Then you'd need to have a pair of lifts, one in the existing shaft, then
another from the existing corridor at the bottom to a suitable place at
platform level.

I don't understand why escalator shafts in new or rebuilt stations aren't
built with sloping lifts alongside the escalators, seems a no brainer to
me... I guess the CoBA doesn't stack up.

The solution at London Bridge was to have a new lift shaft at one of the
more distant exits, and a dedicated and rather long horizontal tunnel
from the platform to where that "landed".
--
Roland Perry