As I have not managed to locate where my remote control is (I have the USB receiver but it's not much use on its own) I decided to buy a compact keyboard and mouse and after several hours of looking at the different options I found the RiiTek RT-MWK01 and promptly ordered it from Amazon as the price was right at just £14.20 compared to over £20 for a lot of the other ones I could see.
It's not the latest model from RiiTek but it certainly does the job and the bonus is that not only is it the size of a typical remote control, it works really, really well and has a backlit keyboard so if you're watching TV with just a table lamp on you wont struggle to see what you're doing with it.
The trackpad is small (and not as useable as one you'd find on a laptop) but is adequate enough for using to operate a media centre on a computer.