Thanks also for posting my picture as I was struggling as to how to do it; seeing your link gave me the solution.
This is my other bike:
![Image](https://i.postimg.cc/5NV6r5Pz/PXL-20231220-121437094.jpg)
![Image](https://i.postimg.cc/SRWwT1q1/IMG-20180725-123929.jpg)
Don't worry to much about it a MOT tester will fail it but the average plod won't be bothered or probably even know the regulations.That's my first job when I get it home; swap the plate.