It has been a long road and still is I would hazard guess.
Both Exhaust shields have been removed, and the exhaust has been checked exhaustively.
All the control arms have been checked or changed on principle, all 4 shocks were replaced, all drop link arms, anti roll bar bushes.
The boot has been emptied, linings taken off, back seats removed, all boxes disk drive, fuse box in the boot etc were cabled tied down (not that they were loose in the first place) then taken for a drive, much to my utter horror nothing had changed.