Hi Jules, you have the same symtoms as me, apart from the movment in my steering wheel has got worse. Vince said him self that the movement appeared to be in the ball joint, however upon replacing it, and having another look, he diagnosed the rack is gone. £180 for the rack, 2 hours labour at stealth to get it repaired. I need to sort my cash flow before I get this booked in, however it's getting progressivly worse the more I drive it! A tell tail sign that it's the rack, is that there is more of a noise from the right hand of the rack than the left as the steering colum is there.