In message , at 14:59:57 on Sat, 25 Feb
2012, tim.... remarked:
They say "any permitted" or "Not HS1" where that indication ONLY applies to
the "single use" part of the ticket. It is irrelevant to any travelcard
element of the ticket, which (as you have been told) is never valid on HS1.

So if the chap was correct in saying there were "&HS1" Travelcards,
you'd have to bail out to the tube/overground/etc at Stratford on the
inbound journey (having arrived at Stratford on a Javelin from Kent)

Or is there some misunderstanding about the existence of such tickets?
--
Roland Perry