1958 US–UK Mutual Defence Agreement as an atomic spy, caused the proposal to be dropped. The June 1951 defection of Donald Maclean, who had served as a British member of the Combined Policy Committee from January 1947 to August 1948, reinforced the Americans' distrust of British security arrangements. The first British atomic bomb was successfully tested in Operation Hurricane on 3 October 1952, but although it was more advanced than the American bombs of 1946, Britain was still several years behind in nuclear weapons technology. The United States conducted Ivy Mike, the first nuclear test of a true thermonuclear device (also known as a hydrogen
Life in the United Kingdom test test earlier than other immigrants were abandoned by the then Immigration Minister, Tony McNulty. The test lasts for 45 minutes, during which time the candidate is required to answer 24 multiple-choice questions. To pass the test, the candidate must receive a grade of 75% or higher, i.e. at least 18 correct answers to the 24 questions. Testing is not directly administered by UK Visas and Immigration (which replaced the UK Border Agency in 2013), but is carried out by learndirect, a private company. As of 18 October 2014 the cost of the test is £50. From November 2005 to March