Bumper came off easily (about 5 mins), there are three bolts in the trunk, the bumper then withdraws rearward to disengage the 'slide ins' on the sides.
Towbar I am fitting is a detachable made by Bosal and is definately not easy to fit, I've worked on it for about six hours now and there's still lots to do, though I was interupted by a few cold beers. If anyone plans on fitting one of these then email me first, I can tell you everything NOT to do!
dieseldave.