Cheers for that, the CV was changed because the garage broke something when they changed a wheel bearing that was attached to the the CV (some sort of rod) but I know the CV's have been looked at and are fine and no sound when turning corners..will get a garage to look at the mounts, I assume they are the engine mounts (lower) as the engine feels quite sturdy in the bay with no lumpiness when accelerating. The knock sounds like a light knock but very much metal to metal....Thanks again