document: The film, directed by Ridley Scott, took £3.9m at cinemas this weekend.
  In second place, Emily Blunt's drug crime drama Sicario opened with takings of £1.6m, while The Walk was another new entry in third with £795,000.
  But Emma Watson and Ethan Hawke's new thriller Regression could only open in ninth place with takings of £215,000.
  In the film, Watson plays a young woman who has been the victim of demonic abuse as Hawke is a police officer trying to uncover the truth.
  It was screened at 270 cinemas over the weekend, according to Screen Daily, compared with 434 for Sicario.
  Sicario has also received much better reviews, with Emily Blunt playing the lead role of an FBI agent who joins an elite force to combat a drugs warlords on the US-Mexico border.
summary: Space epic The Martian, in which Matt Damon plays an astronaut stranded on Mars, was the top film at UK box offices for a second week.