This mod makes UK LSPDFR way better, I recommend using it.
I am writing that in 2025 and there is an issue with the files as there were new updates to the game and the automatic OIV file won't be enough, here's the fix I found to have your UK plates:
1. Install the automatic OIV.
2. Find the file "vehshare.ytd" that got modified by the OIV file, you can either go to the manual install and take it or do a search by Open IV and make sure it is the correct one.
3. Make a search in all archives: "vehshare", it will show you 5 vehshare.ytd, replace all of them to the vehshare.ytd with UK plates.
4. Make sure that all the vehshare.ytd are modified with the UK plates (number may be different because of GTA updates).
5. Enjoy UK plates.
Disclaimer, it worked for me but make sure you have a backup of base files.
@GTOMO98, hope it helps you and if you wanna update it you also have the fix. 🙂