I was in Tesco Extra this morning, when I stumbled across this deal for Tesco Raw King Prawns 250g Pack, for the insane price of 62p a pack. I nearly had a coronary down their frozen aisle, and promptly picked up a few packets.
These are normally £5 a bag, but are sometimes on offer at £2.50. Worth picking up a few if you like prawns and are a seafood lover.
I'm not sure if this is nationwide or what, but I was at the Accrington Tesco Extra, down Eagle Street.