On Wed, 18 Nov 2015 10:13:56 -0800 (PST), Chris Miles-Patrick Date
wrote:

Marylebone to Northolt Park takes 15 minutes. Oxford Circus to Northolt
takes 29 minutes. Green Park to South Harrow (which is the nearest tube
to Northolt Park) takes 39 minutes. I don't see how either of the tube
lines can be called a valid substitute for the Chiltern.

Northolt Park to Oxford Circus via Marylebone takes how long?

Over an hour if you don't match yourself to the Chiltern timetable.

Chiltern may take *only* 15 mins to Marylebone but what about both the *station interchange* and *tube transfer* times on the Bakerloo line to Oxford Circus? It's then roughly the same time if you go either direct on LU or Chiltern with a change at Marylebone.

Remember that most Chiltern local trains also terminate in the platforms at the very end of the station which is a good 3-4 minute walk to the station entrance/tube station - one of the reasons I despise using Marylebone.

Entirely down to the folly of the nationalized railway. First they
made it hard to build the planned, but unbuilt, platforms 5 thru 10.
This was done by allowing the British Waterways Board HQ to be built
within the station's footprint.

Later, having made the cab road into platforms they allowed the BNP
Paribas Bank building to replace the BWB HQ building and further
encroach into the station. It occupies part of the original platforms
three and four, the now shortened five and six.
There can have been few organizations more destructive, expensive, and
less customer friendly than British Railways.