He has trained would-be assassins and marshalled invading hordes, Napoleonic forces and Roman regiments, but movie military adviser Paul Biddiss found himself in the midst of his biggest Hollywood skirmish last month when the actor Saoirse Ronan made a powerful intervention about women’s personal safety. Ronan, a guest on Graham Norton’s BBC chatshow sofa, sparked a nationwide debate about women’s security fears when she interrupted fellow actors as they discussed techniques that Biddiss had taught the casts of both Gladiator II and the new drama series The Day of the Jackal. Paul Mescal, who opens in cinemas this weekend in