Good evening,
Took the Audi to the specialist today, on the diagnostic and 10 to 15 minutes advised there was an error code and the issue is to do with the fuel sensor, apparently if it is a degree over then it over compensates the fuel causing the laboring and juddering at first start up, now just waiting on the outcome to fix as the technician wanted to research before calling with the final outcome. I am so greatful you suggested going to a specialist. I do find it odd though that the dealership never picked up on the error. I will check in again when know the final fix.
Kind Regards
Deborah