Opening up yet another Oyster/Travelcard thread so that it doesn't confuse OPs on existing threads.
We are a couple who will stay in London for 5 days, then travel outside for a week, and then be back in London for an additional week ( of which 2 days might be an outing to the cotswolds). Sorry if this sounds complicated. I believe we will be commuting from a suburb based in zone 4 (ouch?).
So it's a 19 day holiday of the UK of which 10 in total will be in London.
1) If we purchase a 10 day oyster, will that be enough for all the days we are in London ?
2) If we buy a 1 week travelpass on arrival, we will only be able to use it for the first 5 days, right ?
And I'm guessing that for the 2for1 offer, it's a matter of buying an eligible travel card for the day. Or is there a better way to do all this ?