"Mizter T" wrote

Nothing's changed, said ticket windows are still hidden behind the
timetables in that passage (which I perhaps somewhat confusingly
described elsewhere as a 'tunnel'), and if you look up you can see the
old (and unilluminated) lightbox signs above them (different windows
for LU and main line train tickets). I'm curious as to when they were
last in use, and when the main ticket office moved into the old
Motorail lounge? Perhaps when BR attempted to reintroduce cross-London
Intercity services in the 80's, perhaps when North London Railways
(the precursor to Silverlink) started running the Clapham Jn to
Willesden Jn service in the early/mid 90's (at least I think it was
them wot did it)...

The BR ticket office moved into the Motorail Louinge for the 1980s
cross-London InterCity. I can't remember what the arrangements were then for
buying Underground tickets.

Peter