2 anecdotes about shall we say older people being stopped by the police seem apposite here as it is possible that the police might have remarked on how you were driving, Frank
1) My elderly uncle who thank god gave up driving in his 80's was stopped for driving too slowly near his home in Scotland. When asked when he had last had a drink he replied that he thought it might have been VE Day.
2) my MIL, bless her, was involved in a minor shunt while staying with her daughter in Leeds and being interviewed afterwards was asked "Now madam, would you say you were driving erotic-like?"