For those people looking to get an extra controller in time for xmas, morrisons are selling the wii play plus controller for £26.99. I believe the controller on its' own was around £24.99.
I did ask and was told this is nationwide. Not sure what the other supermarkets are charging but I couldn't find this for less than £34.99 on Canterbury high street (game/gamestation/hmv). Did see a post about WH Smiths selling these for under £25 but couldn't find any video game stuff in the Canterbury branch.