Stenhousemuir (Central Scotland) in store prices - can't vouch for other stores.
I know Asda instore games bargains have been posted recently but just ventured into my local store and their sales area had some very good prices.
Highlights from memory include Mass Effect 2 for £6 and Mod Nation racers for £5.
Others I can remember are Forza 3 for £11, M.A.G for £8 and Street Fighter IV for £10. Plenty of copies of all and many other titles too.
They seem to be trying to shift out a chunk of their gaming stock so may be a nationwide "big push".