Does the numbers of the Orkney Islands starts with O.? Today I say a Volvo V 70 XC with a British plate, beginning with OE. The small flag in the blue Euro-part was a Scottish one.
Under the current system, the
area codes OA to OY all belong to Oxford. All Scottish area codes begin with S.
...even the "national" symbol of the Isle of Man you can sometimes see in the UK.
The Isle of Man is a Crown dependency, like each of the Channel Islands, and has
its own registraton system. The Manx triskelion symbol appears on new Isle of Man plates but I'm sure it wouldn't be allowed on British plates, because it would give the impression that the car was registered in the Isle of Man.