It's been nearly a decade since I was in London. I expect some things have changed. I plan to use a friend's Oyster card. I assume it's a pay-as-you-go. I'll be in London for 16 days. Last time, I was able to put a 7-day travel card on the Oyster and use the daily cap for the rest. I looked at the Oyster website to see if that is still the case and came away confused . . . it sounds like I need a paper ticket? I would want 2 7-day cards.
If the weather's good, I hope to make day trips to Cambridge and Oxford. Can I use Oyster for that?
Can I pay for other stuff besides travel with the Oyster?