An excerpt from, "British PM Willing to Nuke Hundreds of Thousands; Parliament Approves Funding" By Jason Ditz, AntiWar.com, July 18, 2016:
The question about massacring civilians with a nuclear strike is a common one during such debates, and historically one prime ministers dodge. Former Foreign Secretary Sir Geoffrey Howe said he believed it was a question no prime minister would ever directly answer.
But with Labour’s leader Jeremy Corbyn being open that he “does not believe the threat of mass murder is a legitimate way to go about international relations,” and that he absolutely would not kill millions of innocent people, May ultimately decided to go the other, pro-nuclear holocaust way.