On Sun, 28 Aug 2016 17:54:39 +0100, Guy Gorton
wrote:

On Sun, 28 Aug 2016 13:49:45 +0100, e27002 aurora
wrote:

Meanwhile services from Marylebone on the old GCGW could run all
stations to Aylesbury with some trains turning back at Gerard Cross
and Prices Risborough. The interchanges at Sudbury Hill (with the
Piccadilly Line) and West Ruislip (with the Central Line) should be
greatly improved.

And the Oxford Parkway route? Fast, convenient, soon to be extended
to Oxford. Having observed the crowds heading for Bicester Village, I
suggest virtually all the patronage is from central London, not sundry
stations NW of Marylebone. Some of the trains are already non-stop
Marylebone to/from Bicester Village, some with one stop.

Guy Gorton

The Oxford trains would use the fast pair to Princes Risborough, thus
accelerating the service.