--- Tom Anderson said:


It does. I reckon it should be extended east from Moorgate, to
Liverpool
Street, then Whitechapel, then turning north to a portal around the
Bethnal Green junction thing, where it could take over the West Anglia
slow lines. Doing that would decouple those lines from the mainline
part
of Liverpool Street, which would relieve the station _and_ allow the
line
to run more frequent trains. It would also give that line more reach
into
town.

The western end would either be some new platforms on the existing
track
at Farringdon (cheap, and still useful), or down into more tunnel to
some
new deep platforms at Farringdon, and then off on some sort of
Crossrail N
jaunt: i like Holborn, Embankment, Westminster, Victoria, then a bit
of
Chelsea-Hackney action to Sloane Square, King's Road Chelsea, Chelsea
Harbour, Clapham Junction, then another portal to take over the slow
pair
on the LSW main line as far as Hampton Court, plus perhaps the
Leatherhead
(IIRC) line down to Epsom (with mainline trains through Epsom going
into
London via Sutton, unless someone feels like four-tracking from Epsom
to
the mainline).

Might be a bit expensive just to save a mile of track, though.


Oooh... this looks like fun. Can I have a go?

As the Met and the widened lines leave Barbican, they're heading SW,
before turning east for Farringdon. Immediately after leaving Barbican,
drop the WLs down into a new tube tunnel, still heading SW to Chancery
Lane and Covent Gdn, then terminate in the Jubilee platforms at Charing
X.

It would provide a missing tube link NW from Charing X and SW from
Moorgate. And might even be cheaper than Tom's option.