"77002" wrote

It really IS time to hand the fast pair over to NR/Chiltern and cut
TfL back to Moor Park and Watford.

I don't think there is any urgent need for a change, apart from the
diversion of Met trains into Watford Junction, and extending Chiltern to
Milton Keynes (via Quainton Road and Winslow). A useful add-on might be an
Amersham - Watford Junction shuttle.

But the joint running is less than perfectly efficient. There have been
previous proposals for the Met to provide all trains between Amersham and
Central London, with Aylesbury - Amersham reduced to a shuttle, or the Met
could be extended to Aylesbury (BR proposals to close Marylebone in the
early 1980s), or for a Crossrail branch across Old Oak Common to the Acton
Wells - Neasden Junction line. which would then have taken over the Chiltern
line to Harrow, the Met Fast Lines to Watford South Junction, and then whole
Amersham, Chesham and Aylesbury service.

I suspect that a recast (though not in the near future) might involve a 25
kV service from Marylebone taking over the Met Fast Lines from Harrow and
all Met services to Chesham and Amersham, but with a West Hampstead
Interchange station so that Chiltern passengers could transfer there to Met
trains to the City or Jubilee trains to the West End and Docklands.

Peter