The holes in the plates are drilled too low:
When she goes in for a service next, I'm going to ask them to do a new plate as it does look a bit pants. I was surprised that they went to the trouble of drilling the plates because previously they've given me new plates with sticky pads on the back. I thought that pre-drilled would save me time masking around the old plate so I could line everything up properly but...
Have you used those plastic number plate screws? What a pain in the derriere they are. One will come out nicely, the other will refused to budge no matter how carefully you try to remove it. I'd do a half turn and it would turn back to where it started. The head broke off one so I had to take it out with pliers which was equally difficult. I eventually found two bolts in my bolt stash which were the right thread and used those. Later that afternoon I thought that perhaps plastic screws are used so that they don't come loose with vibration. Off to Halfords I went. They only had blue number plate screws. Blue?! Who uses blue screws? Onto Amazon to buy a bulk pack of black, white and yellow screws. If anyone needs any, you know where to come....