Question: Who was the British Conservative Party politician who was the highly energetic Prime Minister of the Wartime Coalition Government (1916–22)?

Context articles: Federation of Conservative Students
William Hayes Fisher, 1st Baron Downham
Fourth Asquith ministry
Shailesh Vara
Clement Attlee
Conservative Party (UK)
David Lloyd George
Stephen Crabb
9th Canadian Ministry
Lloyd George ministry

The Federation of Conservative Students (FCS) was the student organisation of the British Conservative Party from the late 1940s to 1986.
 It was created to act as a bridge between the student movement and the Conservative Party.
 In its final years it became known colloquially as "Maggie's Militant Tendency", in reference to then Prime Minister Margaret Thatcher and to Militant, an entryist group active in the Labour Party at the time.
 The FCS was then broken up by the Chairman of the Conservative Party, Norman Tebbit, after one of its members had accused previous former Prime Minister Harold Macmillan of war crimes in extraditing Cossacks to the Soviet Union.
 The FCS was replaced by the Conservative Collegiate Forum.
William Hayes Fisher, 1st Baron Downham PC, KStJ (1853 – 2 July 1920), was a British Conservative Party politician.
 He held office as President of the Local Government Board and Minister of Information in David Lloyd George's First World War coalition government.
The fourth Asquith ministry, a wartime coalition government, was formed by H. H. Asquith on 25 May 1915.
 The change of government resulted from attacks on the Asquith administration, and particularly on Winston Churchill, by the Conservatives in the aftermath of the Gallipoli disaster, and in the context of the Shell Crisis.
 The new cabinet included nine Conservatives and one Labour member, but the Liberals continued to hold most of the important posts.
 The Conservatives were not pleased with the offices they received and Tory leader Bonar Law became dissatisfied with Asquith and the Liberals' conduct of affairs.
 The government collapsed in December 1916 as a result of the resignation of the Conservatives, who refused to serve any longer under Asquith.
 Asquith and most of the Liberals then moved into opposition, while the Conservatives formed a new coalition with a minority of the Liberals, under the leadership of Liberal David Lloyd George on 6 December 1916.
Shailesh Lakhman Vara (born 4 September 1960) is a British Conservative Party politician.
 He was elected Member of Parliament (MP) for North West Cambridgeshire in the 2005 general election, succeeding Brian Mawhinney as the Conservative MP for the seat.
 Vara has previously been a Vice-Chairman of the Conservative Party.
 In 2006, he was appointed to the shadow ministerial post of Shadow Deputy Leader of the House of Commons.
 Following the 2010 general election, he was appointed to the position of Assistant Whip in the coalition government.
 On 7 October 2013, he was appointed Parliamentary Under Secretary of State at the Ministry of Justice.
Clement Richard Attlee, 1st Earl Attlee, {'1': ", '2': ", '3': ", '4': "} (3 January 1883 – 8 October 1967) was a British Labour politician who served as Prime Minister of the United Kingdom from 1945 to 1951 and Leader of the Labour Party from 1935 to 1955.
 In 1940, Attlee took Labour into the wartime coalition government and served under Winston Churchill, becoming the first person to hold the office of Deputy Prime Minister of the United Kingdom.
 He went on to lead the Labour Party to an unexpected landslide victory at the 1945 general election; forming the first Labour majority government, and a mandate to implement its postwar reforms.
 The 12.0% national swing from the Conservatives to Labour was unprecedented at that time and remains the largest ever achieved by any party at a general election in British electoral history.
 He was re-elected with a narrow majority at the 1950 general election.
 In the following year, Attlee called a snap general election, hoping to increase his parliamentary majority.
 However, he was narrowly defeated by the Conservatives under the leadership of Winston Churchill; despite winning the most votes of any political party in any general election in British political history until the Conservative Party's fourth consecutive victory in 1992.
 Attlee remains the longest-ever serving Leader of the Labour Party.
The Conservative Party, officially the Conservative and Unionist Party, is a centre-right political party in the United Kingdom.
 It is currently the governing party, having been so since the 2010 general election, where a coalition government with the Liberal Democrats was formed.
 In 2015, the Conservatives led by David Cameron won a surprise majority and formed the first Conservative majority government since 1992.
 However, the 2017 snap election on Thursday 8 June resulted in a hung parliament, and the Conservatives lost their parliamentary majority.
 They are reliant on the support of a Northern Irish political party, the Democratic Unionist Party (DUP), in order to command a majority in the House of Commons through a confidence-and-supply deal.
 The party leader, Theresa May, has served as both Leader of the Conservative Party and Prime Minister since 13 July 2016.
 It is the largest party in local government with 9,237 councillors.
 The Conservative Party is one of the two major contemporary political parties in the United Kingdom, the other being its modern rival, the Labour Party.
 The Conservative Party's platform involves support for free market capitalism, free enterprise, fiscal conservatism, a strong national defence, deregulation, and restrictions on trade unions.
David Lloyd George, 1st Earl Lloyd-George of Dwyfor, {'1': ", '2': ", '3': ", '4': "} (17 January 1863 – 26 March 1945) was a British Liberal politician.
 As Chancellor of the Exchequer (1908–1915), Lloyd George was a key figure in the introduction of many reforms which laid the foundations of the modern welfare state.
 His most important role came as the highly energetic Prime Minister of the Wartime Coalition Government (1916–22), during and immediately after the First World War.
 He was a major player at the Paris Peace Conference of 1919 that reordered Europe after the defeat of the Central Powers.
Stephen Crabb{'1': ", '2': ", '3': ", '4': "} (born 20 January 1973) is a British Conservative Party politician.
 He has been the Member of Parliament for Preseli Pembrokeshire since the 2005 general election and was Secretary of State for Work and Pensions from March 2016 until July 2016, when Prime Minister David Cameron resigned and Theresa May took over as Prime Minister and Leader of the Conservative Party.
 He has previously been a government whip, a junior minister for Wales and the Secretary of State for Wales.
The Ninth Canadian Ministry was the first cabinet chaired by Prime Minister Sir Robert Borden.
 It governed Canada from 10 October 1911 to 12 October 1917, including only the 12th Canadian Parliament.
 The government was formed by the old Conservative Party of Canada.
 The Conservatives governed in coalition with the Liberal-Conservative Party until 12 October 1916 when the last Liberal-Conservative cabinet minister, Sam Hughes, was dismissed.
 Borden was also Prime Minister in the Tenth Canadian Ministry, which he formed for the coalition government with the Liberals.
Liberal David Lloyd George formed a coalition government in the United Kingdom in December 1916, and was appointed Prime Minister of the United Kingdom by King George V.
 It replaced the earlier wartime coalition under H. H. Asquith, which had been held responsible for losses during the Great War.
 Those Liberals who continued to support Asquith served as the Official Opposition.
 The government continued in power after the end of the war in 1918, though Lloyd George was increasingly reliant on the Conservatives for support.
 After several scandals including allegations of the sale of honours, the Conservatives withdrew their support after a meeting at the Carlton Club in 1922, and Bonar Law formed a government.