On 28 Oct, 07:10, Stephen Furley wrote:
On 28 Oct, 04:05, D7666 wrote:

I would have thought the most significant length constraint would be
Willesden Junction (for LO trains obviously not SN). To extend that to
8-car would involve bridging WCML and that would not come cheap.

Which would put the high-level station back just about where it used
to be. *I'm certainly not holding my breath for that to happen.
They've been talking about re-building the platforms on the slow lines
almost since the old ones were demolished. *I'm not expecting that to
happen in my lifetime either.

How long were the platforms at the old station? *Given the previous
platform lengths at various other North London Line stations, I'm
guessing that they were rather longer than at the present station.

The original station also had a third platform, generally known as the
'Earls Court Bay', though I believe it was actually a through
platform, rather than a real bay. *If this was still available it
would have avoided the situation which existed a few years ago, I'm
not sure if it still does now as I haven't used the line for some
time, where a train arriving from the WLL is held just before the
junction while trains run through in both directions on the NLL, so
you then have a long wait for a connection on that line.

This is why NEW tube lines - be they tube size or main line size -
need to get under way now as they take 10 years to build even once
planning is done, and that takes years too.

An LU person at a LURS meeting at the time that the Jubilee Line
extension was being either planned or constructed stated that this was
being built to traditional tube dimensions only because the rest of
the tube section of the line was that size, and that any future tube
line would almost certainly be to take surface stock size trains, as
the cost of tunneling to the larger size would not be much greater
using modern equipment and techniques.

Don't suppose you know of any diagrams of the old pre-1960's layout of
Willesden Junction?

I hear odd descriptions from time to time, but the best I've ever
managed were a few scattered old photos that didn't really give any
indication of how it all was laid out.

Something for the station's wikipedia page perhaps