Ian F. wrote:
Gone blank for a minute - if I'm doing this journey, do I need a
Z1-6 travelcard or can I use a Z2-6? I'm intending to travel by
Southern/Silverlink.

Apologies for being such an idiot - I've done this journey loads of
times, but can I remember...?

If your journey is via Clapham Junction, Kensington Olympia and
Willesden Junction, you won't enter Zone 1, so a Z2-6 Travelcard will be
OK.
--
Richard J.
(to e-mail me, swap uk and yon in address)