Just having a little browse on Ebuyer and saw this. May be useful to people looking for an extra wireless controller. Works out about £5 cheaper than anywhere else.
High-performance wireless gaming is here! Using optimized technology, the Xbox 360 Wireless Controller lets you enjoy a 30-foot range and up to 40 hours of life on the two included AA batteries - and when they run low, you're given ample warning so you can connect a Play & Charge Kit for uninterrupted play. Plug the Xbox 360 Headset into the controller for full two-way voice communication: a wireless first.
11 in stock at time of posting.
Same as this only wired: http://www.ebuyer.com/UK/product/99418