Thanks, will be checking all these. Not the wheel nuts though, checked those recently.
I was expecting it to be something like the pad spring clips or such like but I need to have a look to see what the set up is on these brakes. I will certainly compare one side to the other though for any obvious differences
Wanted to have a good look before going back to CC for help. I had pad knock once before on another car after brake pads/discs were changed and that went as mysteriously as it came..