Tesco Finest American Double IPA (a mouthful in more ways than one) is currently 3 for £4 in my local branch*. It's made by Brewdog, comes in at 9.2% and is an absolute hop-tastic blockbuster - thoroughly recommended.
*Well, one of them. The other two nearby don't seem to have any, so it might be a bit sporadic for stock. Especially if I keep buying up as much as I can get my hands on 
