ok so basically this is the story..
i had spacers fitted and the bolts supplyed were to short, so they used longer ones which were to long & then fitted a washer to it.......... bodge up.. the in reverse i kept getting a weird noise
then i got new wheels and the same person removed the spacers... BUT used the same bolts............. which ARE far to long, and they have gone straight into my sensor ring and now the noise happens all the time... i THINK this is the issue...
epic fail.............