The number plate fonts worldwide are mostly badly designed. The best one I have seen is the Dutch system where it is hard to get wrong.
The uk font, well from a distance O and 0, and I and 1 are the same due to the 1 not having serifs far too many people stick a pair of 1s close together and add a suitable fixing hole with a black cap, the same as a 8 with a white cap in the centre.
But then it comes down to the issuers being sensible and blocks say I and O from the letters to make it easier to read.