Reviewed by GREG KING Director: Saul Dibb Stars: Sam Claflin, Asa Butterfield, Paul Bettany, Toby Jones, Tom Sturridge, Stephen Graham, Rupert Wickham. A timely release sees this powerful and moving drama about the horrors of war, the senseless slaughter of a generation of young men, and the futility of it all, reach our screens to commemorate the centenary of the end of WWI, “the war to end all …