They won't fail you if they know the correct laws or you have the documentation with you. I've never had issues with cut down plates following the legal criteria. Think of the other end of the stick such as the older Jags and Rover 75's they had massive plates oversized to fill the back recess.There's a specific letter height and amount of spacing between each character that it needs to be. It's not the size of the plate, it's the size of the characters and spacing between and around them.
If you go for an MOT without you're full-size plate they will fail you for it, I always keep mine in the boot just in case.
+ 1 - but at least it's not like people are shouting about it on public forums and displaying their number plates......oh, wait a minute....:chairshotNo plate or bike plate looks a bit silly in my opinion.
Just mark the owner out as thinking they are clever, obviously flouting the law.
Not sure I see the purpose.
Do people think it's clever or it's that important to the car's looks?
Don't get it myself.