Was M1 a British costume designer and art director of a film
SELECT count(*) WHERE {
?x0 a ns:film.film .
M1 ns:film.film_art_director.films_art_directed ?x0 .
M1 ns:film.film_costumer_designer.costume_design_for_film ?x0 .
M1 ns:people.person.nationality ns:m.07ssc
}