I have a couple of questions about 7 day travelcard, I saw a lot of topics about that is this forum but I'm still confused, so here is what I understand so far :
7 day travelcards can be purchased on any underground and trail station, they can be issued on paper or on an Oyster card. for this latter, I'll be paying a refundable £5 and maybe a photo (!!?). I am arriving at Stansted Airport, so I can buy an Oyster Card with 7 day travelcard (zone 1-3) on it at Stansted train station, is that correct ?
Can I use this travelcard on the Stansted Express from Stansted station to Liverpool street station ?
Can I buy this Oyster Card with 7 day travel card online and collect it on Stansted train station ?