Superphil
Dismember
Try any of the supermarkets and buy when they have offers. You can usually get a £10 wine for a fiver!
What you have there is a £5 bottle of wine which they previously tried to rip people off by 'selling' it for £10.
If you want to drink good wine, priced appropriately, go to an independent wine shop, there's plenty about, or majestic at a push, and buy wine there. You might not get something for £5, but you'll get something for not a lot more, and it will be better than what you buy in a supermarket for the same price.