Is it worthwhile to buy advance train tickets from Heathrow into Paddington Station London in case your overseas flight is delayed? Advanced seems like it would save the trouble of trying to buy tickets in an already confusing airport and if we allow an hour (not checking bags) it might work out. Can advance tickets be refunded if the flight is late?
Also is it worthwhile to have both an Oyster Card and a "two together" or "senior" railcard while in London?
Thank you
Jenny
Maryland USA