In message , Tim Roll-Pickering
writes

Paul Terry wrote:

Because it is not (yet) accepted by National Rail in most of the London
area.

But they have no problem accepting my longer season ticket so why not a one
day season ticket?

I've never seen a good reason why a (pre-purchased) ODTC on Oyster
shouldn't be acceptable to the TOCs (pre-pay is a more complicated
issue, of course). Still, it *is* going to happen, despite the TOCs
dragging their heels at every opportunity.

--
Paul Terry