Data, How It Works, Legal & Regulatory, News U.N. says U.K. nuke plans would violate NPT The U.K.’s decision to boost its nuclear warhead stockpile would breach the 1970 Nuclear Nonproliferation Treaty, a U.N. spokesperson said. By Arete News - March 17, 2021 London's Science Museum exhibits a WE.177 nuclear weapon deployed in the United Kingdom from the 1960s to the 1990s (AN/Paul Hudson) You need to login to view this content. Please Login. Not a Member? Join Us