Thanks for that. The wheel damage is literally a half inch scuff to the primer on the rim. Should mention it is an MY11 car with the silly paint finish that no one can match I'd be happy with a closish match as you can hardly see the issue now (and it is white primer!)Try these guys...
Specialised Paintwork - Contact
They are near Porsche in Calcot. I had a car park door dent on the GT-R repaired by them. Very happy with their work.
Depending on the damage to the wheel you might want to consider Alloy Wheel Refurbishment | My Alloys, the alloy wheel refurbs experts in Basingstoke. They do full refurbishment of wheels. I had one of mine fixed a couple of years ago and they did a very good job of matching the colour. Incidentally, this is a multi-stage process. They stripped the wheel completely, repaired the scuff and then a three-stage paint process to get the desired result. First a black base coat, then a translucent dark-chrome 'effects' coat and then clear lacquer. My repaired wheel has a higher standard of finish than the other, original wheels.