Tom Anderson wrote:

Did the link from the NLL to the GN not exist before the Moorgate line
was plumbed in? What did the railways round that area look like in, say,
1965?

There was a book called the 'northern line extensions' published in 1981
by the London Underground Railway Society showing the planned expansion
from Finsbury Park to Stroud Green and Crouch End. It deals with the
early plans and has photographs of Drayton Park in Tube owneship and as
relaid for BR.

It was originally part of an ambitious plan involving the 1938 tube
stock interrupted by the war and ultimately never to see fruition even
though signs and tunnels and stations were built.

You would also have been able to travel from Alexandra Palace Via
Finsbury Park to Moorgate. and out as far as Bushey Heath.

The book says "When the 1938 stock was ordered a number of cars were
designated as owned by L.N.E.R these being that companys share of
operating the service to High Barnet and Edgware via Finchley. Each of
these cars carried a plate "Property of L.N.E.R" which remained in place
until refurbishment for the Bakerloo, or scrap circa 1973

There is a fiar amount of detail in this particular pamphlet about the
1938 stock but heres a pertinent paragraph (slightly compressed) talking
about its introduction:

"The Northern Line would be operated totally by 1938 stock. The Bakerloo
would continue with Pre-1938 stock but would have eight new trains. The
Northern City Line (Moorgate to Alexandra Palace) would be operated by
both pre-1938 and 1938 stock. So that extra trains could be made up 1927
trailers were reserved for the Northern City Line but in any event went
to Bakerloo by 1941. The central line would be wholly operated by ex
nothern line pre-1938 stock, and in consequence there was a lot of spare
pre-1938 stock stored in sidings and depots."

mysteryflyer.