Can anyone explain how London Travelcard fares work, as in from where you can get them, how much they cost etc? I've never really got my head around them in the past, and don't know if they're cheaper than buying tickets separately and so on. In particular, I'm looking to go from Cambridge to Oval tube station and return this Saturday and want to know what's the best (i.e. cheapest) ticket to buy. I don't have an Oyster card if that's relevant.
Thanks!
Thanks!