mark wrote:I've just found your results from 03 and the weight of the GPX comes in at 1307 kgs
You're right of course Mark, I dunno why I had a figure of 1230Kgs in my head

Now I'm really confused, I've thrown a load of ICE and bitchumen based sound proofing in there since and now the car weighs 57Kgs lighter

It appears that the weight figure that appears on your NCT report can't be trusted!
As regards emmisions, I'd leave the injector cleaner out of there for a start, drive the bejaysus out of the car on the way up to the test as well. If it fails again then your cat or lambda sensor could be on the way out. At that stage you'd want to be taking the cat off to see if the matrix is damaged, if so then get a loan of a cat for the next test. Do an oil change before the test, IIRC oil thats been knocking around the engine for a while can lead to higher emmisions (although I can't remember why...)
CJ