Thanks David very valuable advice. I am the only driver, nothing happened to the car afaik. I did visually check for obvious signs, but nothing apparant. My measurements were done, car on garage floor, with a piece of alloy box section on the rim edges a spirit level and a calliper. Repeated with the wheels turned 180deg The negative camber is also visible with the naked eye. In any case i'll get it checked by a garage an check the front end when it is off the floor.
Cheers J