Also £11.95 at Zavvi. There's no image on the product page but RRP says £29.99 so presumably it's the official one.
Based on the acclaimed design of the Xbox Controller S, the Xbox 360 Controller features an extended nine-foot cable and up an improved ergonomic design. The centralised, glowing Xbox Guide Button grants you quick access to your digital movie, music, and games libraries. The ultimate in gamer flexibility, precision, control, quality, and comfort are all yours.