"Mizter T" wrote

I *think* part of the reason SWT were so difficult about coming round
to the idea of accepting Oyster PAYG within London was that they were
in some dispute with the DfT as to how their ITSO smartcard scheme
would function alongside Oyster - I speculate that one of the problems
may have been the details as to how to get these two systems to mesh -
with DfT perhaps attempting to wash their hands of the details, and
TfL only really being interested in deploying the Oyster system (what
with the ITSO smartcard system being an SWT franchise commitment,
rather than something that directly involves TfL).

From the point of view of the passenger with a travelcard season from
Guildford to Zone 2 he wants a ticket which will open gates wherever his
ticket is valid. He also wants to load PAYG on to it for journeys into zone
1. His card will presumably have to be both ITSO and Oyster compatible, but
he won't want complications (or double charging) if he goes through a gate
with both capabilities.

Peter