On Tue, 26 Sep 2006 17:52:52 GMT, "Richard J."
wrote:

wrote:
Actually the PAYG fare would be for Zones 3-6, otherwise he would
not have a valid ticket between Northfields and Boston Manor
(across the zone 3/4 boundary). The costs are the same, though.

Actually it would be for 4-6, because his travelcard covers zones
1-3, and so the extension would be for the additional zones he is
travelling through - zones 4-6. Otherwise he'd be paying twice for
zone 3.

The travelcard covers his journey as far as Northfields (zone 3) and not
beyond. He then needs an extension which is valid from Northfields to
Heathrow, which has to be a zone 3-6 single. Your logic would work if
Northfields were a boundary station in both zones 3 and 4, but it isn't.

For LU fares you add on the zones as they are contiguous. You do not
have to buy from the last station within a zone.
--
Paul C


Admits to working for London Underground!