On 5 Oct, 22:53, MIG wrote:

Ah. *I remember going a fair way east under the Cental platforms to
where the old ticket window was in a subway, so maybe it's that then.
There were also strange signs above the stairs from the platforms
referring to the subway as a "kiosk".

Before the new entrance was built and the new ticket hall and subways
opened the entrance was just behind where the steam loco was later
mounted on a plinth for a while. The entrance was down a slope;
previous to that it had been at a higher level, and pre Central Line
extension and Shenfield electrification it was totally different.
Anyway, pre-Jubilee Line you walked through the ticket hall, and then
turned left, through a long subway under platforms 3 and 5. at the
end of the subway there were steps up to 3-5 and another subway to the
right leading to 6 and 8. There as also an entrance to the low level
platforms for North Wollwich and Richmond, originally Palace Gates.
If you didn't turn left into the long subway but went straight ahead
there was a very dirty subway, full of junk which led to platforms 9,
10 and 11 and originally 12 and 13, but the subway had been sealed off
before the stairs to these platforms until 12 was re-built and re-
instated. There were two staircases which originally came up near the
old, now demolished, station building on 10, but these were sealled
off at platform level, and later boarded over in the subway. There
were various rooms and passages leading off this subway, I think one
led to a relay room under the signalbox, and another probably gave
access to the disused liftwhich could still be seen on the platform
above. This subway was almost disused, there were one or two trains
per day to Tottenham Hale from the high-level platforms, and
diversions during engineering works until the access to 12 was re-
instated.

Both the long subway, and this old subway were closed during the
Jubilee Line rebuilding works. The long subway still exists, but most
of it is now only accessible to staff; a short section serves a
passenger lift. The old subway leading to platforms 9 and above still
exists, but was closed off by gates/railings at platform level. It is
this subway which was shown on the plans as to be re-opened.