You know what its like trying to do everything in this last week (especially as we have house guests for 2 weeks).......
Every year my Mum gives me a full savings card for Somerfield (one of those ones where you buy the stamps through the year) to buy goodies/drinks etc for Xmas. I never usually shop there myself but its her nearest supermarket.
So there I am in the checkout in Somerfield this morning, woman tells me the total which is 7p over the voucher/card total. I say "thats not bad considering I was adding it up in my head on the way round" as I hand her the card.
She looks at me and says "Yes thats great but this is a Tesco voucher".
I was -what a numpty. Every year its a Somerfield one, this year its Tesco, next year I will check before making presumptions and heading off to the wrong supermarket