Earl Purple wrote:
(And I don't think there is any way of avoiding a zone 1 and/or 2
section without touching out and getting a bus, or maybe Silverlink.)

You can avoid zone 1:

change at Acton Town for District Line
Change at Turnham Green for train going in reverse direction
change at Gunnersbury.

Alternative via Earls Court, Olympia, Willesden Junction.

Another alternative via Acton Town, Rayners Lane, Finchley Road then
street level to Finchley Road & Frognal or alternatively West Hampstead
but the interchange there is also street-level. (That is assuming
Silverlink between West Hampstead and Stratford as the Jubilee Line
goes into zone 1)

The problem here is that the putative Travelcard for this example is
only z12. The NLL goes into z3 at Willesden, Hampstead Heath and
Stratford, and Oyster Prepay to cover the difference isn't valid until
the end of 2007.

--
John Band
john at johnband dot org
www.johnband.org