A One Day Travelcard purchased outside Greater London includes one
return rail journey only to the London boundary.


Clipping the card shows you have made one half of the journey.

But what about travelcards purchased inside greater london? On the WAGN
train I was taking this morning the ticket inspector took my one day
travel card (bought in Zone 5) and stamped it. I would love to what the
point of her doing that was. There was an ispector last week who just
looked at it. As I usually take the northern line, I have no idea what's
'normal' for ticket inspectors to do.

Scot