So if we arrive in London at the Waterloo National Rail station, we should just go downstairs to the Waterloo Underground station and purchase our Travelcards at a ticket window and they will be issued to us on Oyster cards, is that correct? Thanks.
Yes. I would specifically ask for it to be issued on an Oyster card, just to be on the safe side. Remember you will have to pay a £5 refundable deposit for the card.