Thanks for the responses. I went back and he said it could be the rear wheels as he's sure he lined it up properly. I said that would be very unlikely (unless he touched the wheels too) and he agreed so will look next week (he's busy and said he wouldn't fit it in as an emergency like before as the car is safe to drive). Which sounds fair enough, I assume it's OK to drive for a while like this? He did mention something about being able to slide the position of the centre bearing slightly or something similar. Does this sound feasible?