Just yesterday in Boots ( 31 Colliseum Way, Ellesmere Port, Cheshire, CH65 9HD) I bought Gillette Fusion Power razor and additional 4 blades. It was Half price pack and I got it for 10.75£. I think it's a good deal, but I'm not sure if it's possible to find it in other Boots shops. There's a picture with my receipt. I hope it will help.
Gillette Fusion Power razor + 4 Fusion power blades HALF PRICE PACK £10.75 @ Boots