In message fBqmc.46$074.38@newsfe1-win, MetroGnome
writes
"Ian Jelf" wrote:

Neill Wood writes
I presume that the ceiling comes down to meet the access ramp
of the underpass somewhere up ahead

Yes but that would be quite a long way ahead, around two "bends, more
or less on the site of the former Aldwych tram station.

No, it would be much closer than that. The road exit ramp is on the site of
Aldwych tram station. However, the road *entry* ramp must only be a couple
of hundred metres behind the Embankment entrance, as it comes down off of
Waterloo Bridge in Lancaster Place (just south of Strand).
Of course it does! I don't know what on *Earth* made me write
otherwise. Maybe it was late or something! (I seem to be doing this a
lot on this group lately!)

(I've always assumed - albeit without any form evidence) that the Subway
followed the Aldwych then turned sharp(ish) left under Kingsway?)

Correct. It follows the line of the streets above, and indeed was built as
an integral part of them . (Aldwych and Kingsway were new roads, built as
part of a slum clearance scheme a century ago in which the old street
pattern disappeared.)
Indeed.
--
Ian Jelf, MITG, Birmingham, UK
Registered "Blue Badge" Tourist Guide for
London & the Heart of England
http://www.bluebadge.demon.co.uk