All persons who drive on UK roads and who are resident in the UK ( not on vacation or on a visa) should hold a British drivers license, not one issued in a country whose driving conditions or standards are not akin to our own. A driver who has passed a driving test on the Asian subcontinent is totally unprepared to the hazards and traffic on most UK roads.
Furthermore. ALL driving lessons and tests should be conducted in English not as some are by instructors from the Asian subcontinent in the pupils own mother tongue .