LONDON — Atom bomb epic “Oppenheimer” won seven prizes, including best picture, director and actor, at the 77th British Academy Film Awards on Sunday, cementing its front-runner status for the Oscars next month. Gothic fantasia “Poor Things” took five prizes and Holocaust drama “The Zone of Interest” won three. Christopher Nolan won his first best director BAFTA for “Oppenheimer,” and Cillian Murphy won the best actor prize for playing physicist J. Robert Oppenheimer, the father of the atomic bomb. Murphy said he was grateful to play such a “colossally knotty, complex character.” Emma Stone was named best actress for playing...