Clement Richard Attlee, 1st Earl Attlee, KG, OM, CH, PC, FRS (3 January 1883 – 8 October 1967) was a British Labour politician who served as the Prime Minister of the United Kingdom from 1945 to 1951, and as the Leader of the Labour Party from 1935 to 1955. He was also the first person to hold the office of Deputy Prime Minister, under Winston Churchill in the wartime coalition government, before leading the Labour Party to a landslide election victory over Churchill's Conservative Party in 1945. He was the first Labour Prime Minister to serve a full Parliamentary term, and the first to command a Labour majority in Parliament.

The government he led put in place the post-war settlement, based upon the assumption that full employment would be maintained by Keynesian policies, and that a greatly enlarged system of social services would be created – aspirations that had been outlined in the wartime Beveridge Report. Within this context, his government undertook the nationalisation of major industries and public utilities as well as the creation of the National Health Service. After initial Conservative opposition to Keynesian fiscal policy, this settlement was broadly accepted by all parties until Margaret Thatcher became Prime Minister in 1979.

Arthur Neville Chamberlain FRS (18 March 1869 – 9 November 1940) was a British Conservative politician who served as Prime Minister of the United Kingdom from May 1937 to May 1940. Chamberlain is best known for his appeasement foreign policy, and in particular for his signing of the Munich Agreement in 1938, conceding the Sudetenland region of Czechoslovakia to Germany. When Adolf Hitler continued his aggression by invading Poland, Britain declared war on Germany on 3 September 1939, and Chamberlain led Britain through the first eight months of the Second World War.

After working in business and local government and after a short spell as Director of National Service in 1916 and 1917, Chamberlain followed his father and older half-brother in becoming a Member of Parliament in the 1918 general election at age 49. He declined a junior ministerial position, remaining a backbencher until 1922. He was rapidly promoted in 1923 to Minister of Health and then Chancellor of the Exchequer. After a short Labour-led government, he returned as Minister of Health, introducing a range of reform measures from 1924 to 1929. He was appointed Chancellor of the Exchequer in the National Government in 1931.

Sir Winston Leonard Spencer-Churchill, KG, OM, CH, TD, PC, DL, FRS, Hon. RA (30 November 1874 – 24 January 1965) was a British Conservative politician and statesman known for his leadership of the United Kingdom during the Second World War. Widely regarded as one of the greatest wartime leaders of the century, he served as Prime Minister twice (1940–45 and 1951–55). A noted statesman and orator, Churchill was also an officer in the British Army, a historian, a writer, and an artist. He is the only British prime minister to have received the Nobel Prize in Literature, and was the first person to be made an Honorary Citizen of the United States.

Churchill was born into the aristocratic family of the Dukes of Marlborough. His father, Lord Randolph Churchill, was a charismatic politician who served as Chancellor of the Exchequer; his mother, Jenny Jerome, was an American socialite. As a young army officer, he saw action in British India, the Sudan, and the Second Boer War. He gained fame as a war correspondent and wrote books about his campaigns.

Alexander Boris de Pfeffel Johnson (born 19 June 1964) is an American-born British Conservative Party politician and journalist, who has been the elected Mayor of London since 2008. He was previously the Member of Parliament for Henley and editor of The Spectator magazine.

Johnson was educated at Primrose Hill Primary School, the European School of Brussels, Ashdown House School, Eton College, and Balliol College, Oxford, where he read Literae Humaniores. He began his career in journalism with The Times, and later moved on to The Daily Telegraph where he became assistant editor. He was appointed editor of The Spectator in 1999. In the 2001 general election he was elected to the House of Commons and became one of the most conspicuous politicians in the country. He has also written several books.

Under Michael Howard, Johnson briefly served on the Conservative front bench as the Shadow Minister for the Arts from April 2004 until November 2004. When David Cameron was elected leader of the Conservative Party in 2005, Johnson was re-appointed to the front bench as Shadow Minister for Higher Education and resigned as editor of The Spectator.

Daniel John Hannan (born 1 September 1971) is a British journalist, author and politician who is a Member of the European Parliament, representing South East England for the Conservative Party. He is also the Secretary-General of the Alliance of European Conservatives and Reformists (AECR). An advocate of localism and a Eurosceptic, Hannan earned worldwide fame for a speech in the European Parliament criticising Gordon Brown.

After stints as a speech-writer for Michael Howard and William Hague, Hannan was elected to the European Parliament at the 1999 election. He led the campaign to withdraw the Conservative Party from the EPP–ED, and was expelled from the group in 2008. Hannan joined the European Conservatives and Reformists (ECR) with his Conservative colleagues when it was formed in 2009 and became Secretary-General of its sister Europarty, the AECR. He currently serves on the Committee on Constitutional Affairs and the delegation to the ACP–EU Joint Parliamentary Assembly. He is also President of the Young Britons' Foundation.