Hi, DH and I will be in London next month for 3 day visit. I've always used an Oyster card for tube travel in previous years (DH doesn't have one) but I understand we could both use our contactless debit cards for payment instead. Do we need to do anything before we go? Do we have to make an account and register the debit cards? Looked on TFL site but it's hard work!!! Or do we just rock up and tap in and out on the card readers as you do with an Oyster card. Thank you 😀