I've been expecting trouble with my plates, as the spacing is incorrect i.e the plate starts P10 D, so had the D moved over so reads P1OD, but absolutely nothing ( better go touch some wood now

)
It was suggested at the time I had them done to have a correct spare set, and if got pulled just say i've been a car show at the weekend
A mate of mine has had trouble though as he runs a dog van, and has the number plate P16 COB with a white mounting cover on the 1 to make it look more like an i and got a fine. Maybe the pig, so I mean copper who pulled him took it personally
However, I personally have no problem with plates as long as it's legible. I once was behind a car for 5 miles before I actually figured out what it should be - to me that is very wrong, and should be had for it, but as long as it is easily readable then no problem. That's what I like about my plate, it says what it's got to say without having to mess with it.