Just found the cause of a creak from the rear over bumps. Its the polystyrene moulding which holds the tyre pump etc in the boot squeaking against the boot floor.
I will add some sticky back foam which should alleviate the problem.

Also an intermittent rattle/click which comes from the B pillar comes from the door contact switch which is under a rubber boot about half way up the post. Not sure how to stop that without removing the screw and adding some grease which I think would invalidate the warranty on the part?