Calum,
Just what I needed. Great thanks.
It is actually on the control unit hidden by a small rectangular plate. Not took the plate off secured by 2 very small allen key fixings.
I think you are right not something for the AA. I have downloaded the Pro Tune software. Car under warranty so won't be messing with at the moment. Will be handy for reading fault codes in the future.
I have cleaned the air filter of all the oil, and re-oiled with a K&N kit. Been for a test drive for about 10 miles, car seems to run as normal, but engine light staying on.
I will try to contact the factory see what they say next week.
Dave