I have opened Pandora's number plate box........
New plate came today so I thought id atleast remove the old one and have a look.
The stainless plate was riveted onto the plate holder which was bent.
And to my amazement the bumper had been resprayed around the number plate!!!! So now I have two shades of red haha
Some.pics below of how I fixed it, had to cut some thin sheet plastic and wedged it between the plate bracket and the polystyrene inside the bumper, then I cut a piece the same size as the bumper cut out so now it sits pretty much flush so I can fix the plate on with double sided stickers.
Just need to fix the plate on, also I think I'm going to put a piece of carbon fibre wrap each side of the plate to cover the paint.