On 2015-03-30, Steve Lewis wrote:
What could be done relatively cheaply would be to build a second platform
at Mill Hill East.

A platform may be relatively cheap. Passenger access to it, not so much.
And all you get is that a train can depart as soon as the following
train arrives.

Combined with reversing trains at Finchley Central in the reversing siding
to the south of the station, rather than in a platform as at present,

As soon as you do that you have to path them between High Barnet trains in
both directions, with consequent problems for both services. And you've
just added to the turnaround time at that end. The current shuttle
frequency is 15 minutes, 10 minutes is possible (though not reliably
so) at the moment. I don't think your suggestions could make 10 viable,
let alone doing any better.

you could increase service frequency to Mill Hill East. Or run a Finsbury
Par to Mill Hill East service at a decent frequency.

Finsbury Park? There's an awful lot of missing infrastructure before
that's possible! When through services (to anywhere) run, they take a
path that could otherwise be a High Barnet train, and because of the
conflict at Finchley Central they either risk an extra path loss, or add
a delay which makes any frequency gain impossible.

Eric
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ms fnd in a lbry