On 20 Oct, 12:30, D7666 wrote:
Don't forget these are long 12 car trains running into or out of the
SPILL station stop - and all trains will stop - they ain't going to be
high speed across the convergence point.

But what do you gain by moving the junction to south of the station?
The only net effect is a longer allowable dwell time as trains will be
able to do some of their waiting (to cross the junction) in a platform
rather than in the tunnel to the north.

So there's only a need for more than two platforms if you think the
dwell time allowed by 24 tph through each platform won't be
acceptable, which you could say about all of the central stations.

In other words, the junction is irrelevant.

U