Batman v Superman: Dawn of Justice has taken $424m at the box office in its first five days worldwide despite poor reviews.The global total,the fourth-highest ever,included $170.1m in the United States, a record for a March debut and the sixth-highest US opening weekend.Dawn of Justice took £15.5m in the UK – also a record for March.The film bringing the two superheroes together for the first time is a welcome success for Warner Bros.