Prime Minister of the United Kingdom sometimes used by foreign dignitaries and news sources. 10 Downing Street, in London, has been the official place of residence of the Prime Minister since 1732; they are entitled to use its staff and facilities, including extensive offices. Chequers, a country house in Buckinghamshire, gifted to the government in 1917, may be used as a country retreat for the Prime Minister. There are four living former British Prime Ministers: Upon retirement, it is customary for the Sovereign to grant a Prime Minister some honour or dignity. The honour bestowed is commonly, but not invariably, membership of the United Kingdom's most
Prime minister Bahrain's prime minister, Sheikh Khalifah bin Sulman Al Khalifah has been in the post since 1970, making him the longest serving non-elected prime minister. The post of prime minister may be encountered both in constitutional monarchies (such as Belgium, Denmark, Japan, Luxembourg, the Netherlands, Norway, Malaysia, Morocco, Spain, Sweden, Thailand, Canada, Australia, New Zealand, and the United Kingdom), and in parliamentary republics in which the head of state is an elected official (such as Finland, the Czech Republic, France, Greece, Hungary, India, Indonesia (1945-1959), Ireland, Pakistan, Portugal, Montenegro, Croatia, Bulgaria, Romania, Serbia and Turkey (1923-2018)). See also "First Minister", "Premier",