On Tue, 10 Oct 2006 02:01:44 +0100, Barry Salter wrote:

Au contraire. It's entirely possible for an NR Ticket Office to issue a
Travelcard including A-D [1] by doing it as if you'd bought it *from*
Amersham. [2]

[2] In other words, by issuing an Amersham to Zone R1256 Travelcard

Would such a ticket be valid to Chesham?