For sale is a gift card valid for use in PC World, Currys, Currys.digital, Dixons and The Techguys stores with a £25.00 balance. It's an actual gift card (not a refund or store credit, etc.) so doesn't require a minimum purchase or anything like that. The only restrictions on it are it has to be used within 2 years (bought last fortnight) and I don't think you can use it towards online payment.
It's an easy way to save a couple of quid if you were buying from any of these stores! :)
I'll happily accept £23.00 for it, which includes recorded postage.