I was looking for a compact wireless keyboard for my new media centre PC I use for my TV and I came across this Trust keyboard with a built in trackball mouse. I looked at a few models of these devices and this seems to be one of the best! Most other stores have this for £36ish, so £28 seems like a pretty good deal.
I've never used Box.co.uk before, but they seem very good and shipped next day! Free Del too!