No need to transfer - Monarch have said they are sending me a cheque for £40 so I have both deals:D
I asked if it would now work for others or was it one voucher code per transaction. I got this answer:
'No, your friends will be able to use theirs. They just need to make sure they validate it beforehand and add it to their monarch account before they try redeeming it.
Hopefully this will work now.'