Have a look for GoPro Hero on Amazon, I think it was a couple of hundred.
Get yourself a big capacity SD card whilst you're there as it'll need one. Amazon does them for about £17 where as staples and PC world will charge around £100!!!
Want to do it immediately if not sooner!! Actually seriously lOoking forward to the Newport tunnel en route to llandow even more than I was already!! Good effort!!
SF