If it was online only I wouldn't say it was much of a deal since it's about this price everywhere, but it seems that Maplin are the selling these for the same price INSTORE as well.
I bought one as I recently managed to break my previous keyboard, typing on it now and I'm finding quite nice to use, build quality feels fairly sturdy.
Edit: For some reason the links got stuffed the correct one should be http://www.maplin.co.uk/Module.aspx?ModuleNo=388389
Spec Below (Copy and paste job)
The mouse seems decent and it's not that much more expensive than some of the no-brand generic sets you can buy.
Full featured wireless keyboard and laser mouse pack
Comfort curve keyboard with quiet keys
Mouse with transmitter storage
Up to 10 metre wireless range
Extended Battery Life
This high specification keyboard features extended battery life with maximum efficiency, most users average more than six months of battery life and a status indicator tells you when your battery is running low. The keyboard and mouse provide wireless freedom, give yourself room to move with a wireless mouse and keyboard that lets you work without worrying about tangled wires. Multimedia Keys, with the touch of a button you can easily access your favorite music, video clips, and media programs.
The mouse features a magnifier, simply point and click to enlarge and edit details using the Magnifier. A Snap-in Transceiver allows easy storage within the mouse; once hooked up to the PC it connects the keyboard and mouse right out of the box with virtually no interference, and provides up to a 10 metre wireless range. Laser mouse technology products are more precise, more responsive, and deliver smoother tracking. 4-way scrolling for greater efficiency and comfort with Tilt Wheel Technology. The mouse has five buttons that can be programmed to do a variety of functions. The rubber grip provides a more intimate, tactile feel.