Was M3 written by and edited by a British screenwriter that M1 was directed by and executive produced by
SELECT count(*) WHERE {
?x0 a ns:film.writer .
?x0 ns:film.director.film M1 .
?x0 ns:film.producer.films_executive_produced M1 .
?x0 ns:people.person.nationality ns:m.07ssc .
M3 ns:film.film.edited_by ?x0 .
M3 ns:film.film.written_by ?x0
}