Yet again thanks for taking the time to raise the issue but it won't be going any further.
After stripping down the rear suspension there is a problem with the bushes on the drivers side.
I've got the B7 RS4 rear brakes on my car and there seems to be an issue with spacing between where the hub connects to the lower control arm. The nearside does not have this problem.
I've ordered another control arm and hub from A8 Parts to compare with the existing setup along with a new set of bushes and bolts from TPS.
So it wasn't Audi component failure it was a problem with the mod.
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Poverty spec 2000 Noggy blue S8. Really want a sorar sunroof like Dezzy had
THE WHALE IS BACK AND BETTER THAN EVER... errr but leaking again