I have booked it into a garage next week (a very reputable one in the area and recommended by a few people i know, so I'm taking a chance) so I can get it looked at. It's funny, I went in and told him the problem and that I had the tracking done 3 times already and he still thinks it might be the tracking, grrr lol.
So anyway, he is going to check the tracking first (because maybe he doesn't believe that a machine that uses lasers as accurate or something lol) and then if that is spot on, which it should be unless its come out again in the past month then he is going to investigate further, which I insisted upon because as we all know, it's not the tracking!!!
Anyway, fingers crossed he finds what is wrong with it.