In message

..net, at 07:52:49 on Wed, 28 Aug 2013, Neil Williams
remarked:
thus the train does not need to stop at the relevant station as long as
you're travelling on a participating TOC (i.e. all of them except East
Coast, EMT, Grand Central, Heathrow Express, Hull Trains and Virgin).

That list is almost as long as a "what did the Romans do for us" list.

It's basically a list of all the TOCs that don't have any trains stopping
twice within the Zones (HEx being an oddity) and thus get no money for
Freedom Passes.

Watford Junction being just outside Z8 has a lot to answer for. Life
would be simpler, but I presume ToC revenue would be impacted, if it was
in Z8, which is what geographic common sense would dictate.
--
Roland Perry