Nice idea's thanks kids, I won't be changing the tyres again though the car had only done 200 miles when I changed them the first time ( before I'd even washed it for the first time strangely ) that was to help with the road noise!
An interesting thing I've noticed is how loud my horn is in the cabin, not that I care of course but it will be interesting tomorrow when I compare it to docs gtd. Our thinking is there is more sound proofing in the diesel. I'll let you know.
Thanks again keep them coming.