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Why are 0 and O (zero and 15th letter of alphabet) indistinguishable, other than by position, on most UK numberplates?
Because they are distinguishable by position. The typeface is chosen to be easily readable as separate characters (by machines too, now), and the allocation is such that there is no ambiguity even with non-standard patterns, i.e. if UFO2 is issued, then UF02 isn't. This is why, in the old ABC123A and A123ABC annual sequences there were no year letters I (looks like 1), O (looks like 0) or Z (looks like 2).
gbj_tester
@chez_jay
Why are 0 and O (zero and 15th letter of alphabet) indistinguishable, other than by position, on most UK numberplates?