As laserman16 says, the Blu-ray is £14.99 at Morrisons - I never expected it would be cheapest there, to be honest, but I just picked it up. By far the cheapest I've seen it, and even with my 10% student discount at HMV (where it's going for £19.99) and my 10% staff discount at Tesco (£19.97) it's still significantly cheaper at Morrisons!