(26 Oct 2013, 9:39 am)Michael wrote I will, seem's daft that they have...
If I remember right it is to do with I being mistaken for a 1 - Mind 0 could easily be confused for a O.
Q is used for de-licenced vehicles (or something along those lines).
No idea about L though... Could have been already registered to a vehicle.
I am sure someone will be able to explain fully.