Hi, thanks for the reply.
These are my thoughts exactly, I have spent hours reading up about these sensors and my conclusion is that they need resetting after wheel alignment, the car had work done to it, it was being driven for a couple of weeks with no problems, I take it there have 4 wheels put on, 4WA done and then the light comes on and the tracking is out, I return, they re do it, admit it was done to the wrong spec, it was slightly better but still pulls to the right, and the light comes on, just not so quickly as before, in all, I was there 4 and half hours, and now need to return on monday to speak to them. I will post my outcome during the week. Thanks.