On 9 Mar, 15:38, wrote:
On Mar 9, 1:39*pm, Ganesh Sittampalam
wrote:

If you have a period travelcard, you can do more or less whatever you
like, except for travelling on Virgin.

What rules out combining tickets when travelling on Virgin?

Definitely, the fact that legally speaking, Virgin don't operate
trains between Watford and London, so boarding one that's physically
there would risk getting you charged the full single fare from Preston/
Crewe/Milton Keynes depending on where it came from.

OK, so Watford is always a pick-up/set-down only stop for Virgin. I
wasn't
aware of that.

Ganesh