In message , at 09:57:43 on Wed, 21 Jan
2015, roger remarked:
but in practice the more expensive ticket should just be accepted via
the cheaper route.

There must be a reason why the tickets are "via Taunton" & "via
Honiton", and not "Any permitted" & "via Honiton". A lack of faith in
ORCATS apportioning the revenue fairly, I guess.

What you can't do is have half a ticket with NSE discount and half
not, if I'm reading your thread on uk.r (this is on uk.t.l) correctly.

Yes, I posted in the wrong newsgroup.

I was pondering if this would be a better answer to the question "Is a
via Taunton ticket valid on a train to Paddington that's bypassing
Taunton because of engineering works, and going via Honiton".

Surely it's allowed under the rule permitting use of any individual
service going from the start station to the finish station. Unless
it's not another operator only ticket.

It's a Route-specific ticket "via Taunton". And on the day I want to
travel there's engineering work, and the train is being diverted away
from Taunton.

If it was a "FGW only" ticket, then it'd be permitted on whatever route
the Penzance-Paddington train took.

For the permitted-by-direct-train rule (had it been an "Any Permitted"
ticket, which it isn't) there's possibly the complication that the
journey is Exeter-London-Cambridge, and there aren't any direct
Exeter-Cambridge trains (only direct trains on each of the *legs*
Exeter-London, London-Cambridge).
--
Roland Perry