Well household is now a proud owner for a legend blue 2014 Abarth 500, very pleased it so far

The only problem is that dealer or previous owner, pumped in self tappers for the rear registration, straight into the boot metal work WTF?

just noticed as we changed to a private reg.

So I buy rust inhibitor and fill the holes ?? and then tape the registration on.  Anyone had a similar issue

I would treat the self tap holes with a rust inhibitor and paint over. You get lots of moisture on the hatch lid in bad weather. I like the smooth look of the number plates being stuck on with sticky pads front and back.

I made sure the paint was cleaned and de greased/waxed and used double the normal number of adhesive pads, does anyone know why the official 4 fixings have such an odd layout.

To expand on my previous comment, if you look on the front bumper of a series 4 there are two black sections at the top of the grill that come down and stick out further than the rest that have a little raised bump on them.  They line up with two more on the actual painted section.  I can't remember exact size they mark out but I think its narrower and taller than a UK plate.

There are several videos of a yellow Japanese Comp (https://youtu.be/RpG28q-aBWE?t=344) that show how their number plates end up looking