As the title says I'm looking at a day out in London using a zone 1-6 travel card, I'm arriving at Euston. One of the moves that I'm thinking of starts at Euston to go back to Wembley Central. I will need the travelcard for this. Can I just buy one from a ticket office at Euston, or do I have to go down onto the underground to buy one. I'll also be using a senior railcard.
TFAH
TFAH