In message . com, at
01:54:20 on Tue, 6 Jun 2006, Neil Williams
remarked:
all this could lead to an interesting fares anomaly, in that
an off-peak travelcard and a peak single back, or a SDR and an off-peak
travelcard bought separately, may now be cheaper than the available
through ticket.

For years it was cheaper to buy a SOS from Royston to London (for use in
the morning peak) and a Network Card SOS back (which was valid in the
evening peak). That's because the route didn't have a Peak Travelcard
(only the more common off-peak ones). Eventually they [WAGN] did
introduce the peak Travelcard (for the right price), and saved a lot of
paper and ticket office queues.

--
Roland Perry