On Tue, May 18, 2010 at 12:06:31AM +0100, Tom Anderson wrote:

He could buy a BZ5 to Gatwick ticket, and use it on any train which stops
at East Croydon (provided the ticket is valid on that train, of course).

Because East Croydon is in Z5? It doesn't work that way.

I normally have a Z1-4 travelcard, but if I get a ticket from BZ4 to
wherever, the train doesn't have to stop in zone 4 for the ticket to be
valid.

BZ tickets are the big exception to the normal rule that if you are
combining multiple tickets for a single journey, you need to travel on
trains that stop at appropriate places.

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