it was actually a number of things:
• loose lug nuts (doh - it happens)
• loose end link (top nut)
• loose spring lock (on skunk2 coilovers)
• loose top lock nut - i don't really know what it's called, it's the 19mm nut in the engine bay
i don't know how they all wiggled themselves loose, i'm going to have to check them again after two weeks of driving. hope this helps anyone