What British director of M1 was a production company 's employee
SELECT DISTINCT ?x0 WHERE {
?x0 ns:film.director.film M1 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
?x0 ns:people.person.nationality ns:m.07ssc .
?x1 a ns:film.production_company
}