"Keith Raeburn" wrote in message
ups.com...

Whether or not this rule is strictly enforced I will leave for others

It often is, in which case if you board you will find yourself charged
the Open Single fare from the previous advertised calling station
(usually Coventry or Birmingham) to Euston.

There was a thread a while back on uk.r that discussed a FGW service that
was non stopped Reading (pick up only) on its way to Exeter without warning;
quite a few pax were excessed to Exeter and then had to get back....

Paul