This may be a stupid question but yesterday I arrived in London without my normal oyster card so I had to pay £5 to get a new one and put some credit on it so my question is when my trip to London ends can I get a refund of the card fee and any credit on the card if I hand it in to a ticket office? Also I loaded my disabled railcard onto this oyster card so does that mean I would need to reapply it onto my other oyster card on my next trip? The person who sold me the card didn't know the answer to those questions. Thanks in advance.