In message ,
Martin Underwood writes

I'd have thought that U and V were fairly easy to distinguish - unlike a
letter D, a letter O and a digit 0 which *can* very easily be confused in
the square font that's used on numberplates. OK, so you won't have an O or 0
in the year position, but D and O are allowed interchangably in three-letter
part of the numberplate. DDO, DOD, ODD, OOD and other permutations are
extremely hard to distinguish.

And U was used in the Isle Of Man for MAN xxxU, AMN xxxU etc.
registrations similar to British ones.
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