I need to make 1 return ride with the London tube. I figured out that a paper tickets is the best option (don't have contactless credit card, and I do not need a oyster card) but:
- Can I buy a paper ticket return upfront (e.g. valid for a month)?
- Can I buy a paper ticket in each underground station (in zone 1)?
- Can I pay a paper ticket there by VISA Credit Card?
- Can I buy London Tube tickets at Gatwick Airport Station from one of those 15 red vending machines which are lined up there? Or is this only for train?