Paul, Wasn't a Citroen garage but one that I have used a couple of times. All the garage said was that it was the subframe, I explained that shortly before I had been driving around gravel tracks and they said it probably just needs a clean? I have cleaned underneath with a pressure washer and the clicking stops for a little while but soon comes back. I have been advised last night that it may well be the drop links which are a nice easy job apparently. Thanks