ok - last chance resort here ... but I have faith in you all!
I am convinced that I have 1 or 2 M&S vouchers which came from a loyalty scheme - something like 'top cash back' where you can cash in your earnings/winnings for either a bank transfer , or if you go for voucher you get a bit more money... but I can't for the life of me think which of the many (!) loyalty schemes it could be ......
Has anyone done something similar and know what I'm talking about? where have you used to get a voucher this way?