Operation Grapple with the American Manhattan Project in August 1943. Many of Britain's top scientists participated in the British contribution to the Manhattan Project. After the war, fearing that Britain would lose its great power status, the British government resumed the atomic bomb development effort, now codenamed High Explosive Research. The successful test of an atomic bomb in Operation Hurricane in October 1952 represented an extraordinary scientific and technological achievement, but Britain was still several years behind the United States in nuclear weapons technology. In July 1954, the Cabinet decided to develop the hydrogen bomb. The United Kingdom Atomic Energy Authority Atomic
UK Atomic Energy Authority Constabulary the UKAEA Constabulary), protecting sixteen atomic sites and protecting transportation of nuclear materials around the United Kingdom. UK Atomic Energy Authority Constabulary The United Kingdom Atomic Energy Authority Constabulary was the armed security police force of the United Kingdom Atomic Energy Authority. The force existed for 50 years, until 1 April 2005. On 1 April 2005, the Civil Nuclear Constabulary (CNC) was established in adherence to the Energy Act 2004, replacing the UKAEA Constabulary largely because a number of nuclear sites were poorly guarded, and that a force with more specialist attributes was needed to combat the possibility of terrorist