The DVLA currently produces Driving Licences and other documents, such as Driver Cards (Digital Tachographs), Driver Qualification Cards for commercial drivers etc. They currently have the EU flag at the top left corner. This should be replaced with a Union Flag or British County Flag.
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The European Union Flag is that of a foreign state and British Drivers Licence Holders should not be required to carry it or display any allegiance to it.
I suggest replacing the EU flag with a Union Flag and or British Regional/ County flag or insignia.