On 18 May, 13:24, Walter Briscoe wrote:

Why don't LU outgoing gates swallow X - London Terminals single tickets?

Would you expect:
London Terminals to Kemble to allow Moorgate to Paddington;
Oxford to London Terminals to allow Paddington to Moorgate?
(Thames Path from source to Oxford over 4 days, next weekend.)
--
I'm sure Paul C will be along with the definitive answer, as I'm not
sure if the gates at Moorgate would allow these or not - I don't know
if LU gates can recognise valid routes to London Terminals (I suspect
not), or if a National Rail ticket to London Terminals that is valid
to Moorgate have a special encoding (which is technically possible).

What is certain however, is that Kemble to Moorgate (as London
Terminals) is not a valid route once you join the Underground (at
Ealing Bdwy to avoid the gates at Paddington), and therefore on the
Underground you would be liable to a Penalty Fare if you didn't have
the back-up of the Z1-3 Travelcard.

It would be interesting to hear the result though if you do try it.

Best regards