Cheers Mouton and amp; Ryan - fingers crossed.
Evoboy, was thick white, thats why I just thought it was the cold air reating with exhaust heat (must admid though I was a tremendous amount, and times in with the other problems rather well) - would test it, but I dare not drive the car at the moment, but I do remember checking out the back of the car down the A3 and I could not notice any smoke, one other thing that I remember (all seems to be coming back to me now!) - was along with the white smoke was an awful smell, like some old bangers oil smoke, but I thought it was just that, as it was in a car park at the time.