As others have said, ring Paypal before you do anything and have a chat with them explaining the situation.
Worst case scenario.....if you have to end up refunding him, log a claim with the RM as soon as you can for the full £45 that you're entitled too with 1st class service, wait a few weeks and you'll more than likely receive a cheque back from them to compensate you. A minor short term pain in the arse but you'd be quids in when the RM pay out.
As I said in my previous post, I've only had to make two claims for compensation from the RM and both times they've paid out.
Worst case scenario.....if you have to end up refunding him, log a claim with the RM as soon as you can for the full £45 that you're entitled too with 1st class service, wait a few weeks and you'll more than likely receive a cheque back from them to compensate you. A minor short term pain in the arse but you'd be quids in when the RM pay out.
As I said in my previous post, I've only had to make two claims for compensation from the RM and both times they've paid out.