First Lord of the Admiralty in the context of "H.M.S. Pinafore"

Sir Winston Leonard Spencer Churchill (30 November 1874 – 24 January 1965) was a British statesman, military officer, and writer who was Prime Minister of the United Kingdom from 1940 to 1945 (during the Second World War) and again from 1951 to 1955. For some 62 of the years between 1900 and 1964, he was a Member of Parliament (MP) and represented a total of five constituencies over that time. Ideologically an adherent to economic liberalism and imperialism, he was for most of his career a member of the Conservative Party, which he led from 1940 to 1955. He was a member of the Liberal Party from 1904 to 1924.

Of mixed English and American parentage, Churchill was born in Oxfordshire into the wealthy, aristocratic Spencer family. He joined the British Army in 1895 and saw action in British India, the Mahdist War and the Second Boer War, gaining fame as a war correspondent and writing books about his campaigns. Elected a Conservative MP in 1900, he defected to the Liberals in 1904. In H. H. Asquith's Liberal government, Churchill was president of the Board of Trade and later Home Secretary, championing prison reform and workers' social security. As First Lord of the Admiralty before and during the First World War he oversaw the disastrous naval attack on the Dardanelles (a prelude to the Gallipoli campaign) and was demoted to Chancellor of the Duchy of Lancaster. He resigned in November 1915 and joined the Royal Scots Fusiliers on the Western Front for six months. In 1917, he returned to government under David Lloyd George and served successively as Minister of Munitions, Secretary of State for War, Secretary of State for Air, and Secretary of State for the Colonies, overseeing the Anglo-Irish Treaty and British foreign policy in the Middle East. After two years out of Parliament, he was Chancellor of the Exchequer in Stanley Baldwin's Conservative government, returning sterling in 1925 to the gold standard, depressing the UK economy.

The Gallipoli campaign, the Dardanelles campaign, the Defence of Gallipoli or the Battle of Gallipoli (Turkish: Gelibolu Muharebesi, Çanakkale Muharebeleri or Çanakkale Savaşı) was a military campaign in the First World War on the Gallipoli Peninsula (now Gelibolu) from 19 February 1915 to 9 January 1916. The Entente powers, Britain, France and the Russian Empire, sought to weaken the Ottoman Empire, one of the Central Powers, by taking control of the Turkish straits. This would expose the Ottoman capital at Constantinople to bombardment by Entente battleships and cut it off from the Asian part of the empire. With the Ottoman Empire defeated, the Suez Canal would be safe and the Bosphorus and Dardanelles straits would be open to Entente supplies to the Black Sea and warm-water ports in Russia.

In February 1915 the Entente fleet failed to force a passage through the Dardanelles. An amphibious landing on the Gallipoli peninsula began in April 1915. In January 1916, after eight months' fighting, with approximately 250,000 casualties on each side, the land campaign was abandoned and the invasion force was withdrawn. It was a costly campaign for the Entente powers and the Ottoman Empire as well as for the sponsors of the expedition, especially the First Lord of the Admiralty (1911–1915), Winston Churchill. The campaign was considered a great Ottoman victory. In Turkey, it is regarded as a defining moment in the history of the state, a final surge in the defence of the motherland as the Ottoman Empire retreated.

Alfred Duff Cooper, 1st Viscount Norwich, GCMG, DSO, PC (22 February 1890 – 1 January 1954), known as Duff Cooper, was a British Conservative Party politician and diplomat who was also a military and political historian and writer.

First elected to Parliament in 1924, he lost his seat in 1929 but returned to Parliament in the 1931 Westminster St George's by-election, which was seen as a referendum on Stanley Baldwin's leadership of the Conservative Party. He later served in the Cabinet as Secretary of State for War and First Lord of the Admiralty. He resigned from the cabinet over the Munich Agreement of 1938.

Charles Grey, 2nd Earl Grey (13 March 1764 – 17 July 1845) was a British Whig politician who served as prime minister of the United Kingdom from 1830 to 1834. His government enacted the Reform Acts of 1832, which expanded the electorate in the United Kingdom, and the Slavery Abolition Act of 1833, which abolished slavery in the British Empire.

Born into a prominent family in Northumberland, Grey was educated at Eton College and the University of Cambridge. While travelling in Europe on a Grand Tour, his uncle secured his election as member of parliament (MP) for Northumberland in a 1786 by-election. Grey joined Whig circles in London and was a long-time leader of the reform movement. He briefly served as First Lord of the Admiralty and as foreign secretary in the Ministry of All the Talents from 1806 to 1807 and then remained in opposition for nearly 24 years. He was asked to form a ministry by William IV in 1830, following the resignation of Wellington.

Winston Churchill was appointed First Lord of the Admiralty on 3 September 1939, the day that the United Kingdom declared war on Nazi Germany. He succeeded Neville Chamberlain as prime minister on 10 May 1940 and held the post until 26 July 1945. Out of office during the 1930s, Churchill had taken the lead in calling for British re-armament to counter the growing threat of militarism in Nazi Germany.

As prime minister, he oversaw British involvement in the Allied war effort against the Axis powers. Regarded as the most important of the Allied leaders during the first half of the Second World War, Historians have long held Churchill in high regard as a victorious wartime leader who played an important role in defending Europe's liberal democracy against the spread of fascism. For his wartime leadership and for his efforts in overseeing the war effort, he has been consistently ranked both by scholars and the public as one of the top three greatest British prime ministers, often as the greatest prime minister in British history.

The Parliamentary and Financial Secretary to the Admiralty also known as the Parliamentary and Financial Secretary to the Board of Admiralty was a position on the Board of Admiralty and a civil officer of the British Royal Navy. It was usually filled by a Member of Parliament. Although he attended Board of Admiralty meetings informally he was not made a full member of that Board until 1929. He served as the deputy to the First Lord of the Admiralty in Parliament and was mainly responsible for all naval finance and spending proposals from 1625 until 1959.