Probably a simple question... Any time I've been to London before I've used single or 3 day travelcards. However this time I'll only be in town from about 2pm on Friday to 8am on Saturday. Travelcards are per day rather than a 24 hour period I believe so I think I'd be better with an Oyster card. I only actually need to make 2 journeys, from Baker Street to Wembley Central on the Friday afternoon, then from Wembley back into Victoria Station early the next morning. According to the fare finder site those 2 trips are about £2.80 for a single if I use Oyster, but double that if I just pay cash. So less than £6 for both trips. But am I right in thinking that I need to pay £5 for the card itself? So that kinda rules out the savings? Also is the minimum you can put on the card £10? So again it defeats the purpose. I'd have to spend £15 on the card as opposed to £12 just buying single fare cash tickets?