tabetha, many thanks for the reply. I am pretty useless when it comes to tech stuff with cars, is there anything I could suggest to them particular that needs to be checked just that I can be sure they will look at it. The hubs and bearings were changed back in March, are the Hub flanges something different then? I just can't understand how it had been fine for a few months and then when I got the balancing and tracking done, the problem came back, could the kwikfit guy have put the balance weights back on wrong?, can it really be that sensitive? Is there a chance that the tyres really do have something wrong with them because originally all these problems started with the new tyres and alloys being fitted, I have had field tests done on all four though. I think anytime it has been in they have said the drive shaft looks fine but I do not know how thorough they are being. With what you were saying about the calipers, could that have caused the warp disc that they changed recently, what would need to be done with the calipers?

Thanks again
Steve