FOCA - the above post gave us reason to believe there was an air leak around the inlet manifold - we have to rely on the information you give us and draw our conclusions/ make our suggestions from that
FOCA - So the air leak in the inlet/ manifold was a "blind alley" - the garage has direct access to the car - we have to rely on the info you post
I am sorry if you feel that it was a waste of your time. I am grateful for your air leak comments: I personally have learnt from them and shall take them on board in the future. The garage that said it was an air leak was different to the garage where I took the car in the end (I was wating for my appontment with them at the time). There are garages to just do an emissions test and there are garages to solve a challenging problem! By the way, the guy who did the job said that there is no air leak, he checked it first.