The Coalition Coupon was a letter sent to parliamentary candidates at the 1918 United Kingdom general election, endorsing them as official representatives of the Coalition Government. The 1918 election took place in the heady atmosphere of victory in the First World War and the desire for revenge against Germany and its allies. Receiving the coupon was interpreted by the electorate as a sign of patriotism that helped candidates gain election, while those who did not receive it had a more difficult time as they were sometimes seen as anti-war or pacifist. The letters were all dated 20 November 1918 and were signed by Prime Minister David Lloyd George for the Coalition Liberals and Bonar Law, the leader of the Conservative Party. As a result, the 1918 general election has become known as "the coupon election".
The name "coupon" was coined by Liberal leader H. H. Asquith, disparagingly using the jargon of rationing with which people were familiar in the context of wartime shortages. 
The letters all contained the same simple text:
We have much pleasure in recognizing you as the Coalition Candidate for (name of constituency). We have every hope that the Electors will return you as their Representative in Parliament to support the government in the great task which lies before it.
D. Lloyd George
A. Bonar Law
Some coalition candidates included the wording of the letter in their election addresses. 
Following confidential negotiations between Lloyd George's coalition Chief Whip, Freddie Guest, and George Younger, Chairman of the Conservative Party, over the summer of 1918, it was agreed that 150 Liberals were to be offered the support of the prime minister and the leader of the Conservative Party at the next general election. 
According to the figures recorded in Trevor Wilson's book, The Downfall of the Liberal Party, 159 Liberal candidates received the coupon. A few of these were Independent Liberals, supporters of Asquith. Of those Liberals receiving the coupon 136 were elected, whereas only 29 who did not receive the coupon were returned to Parliament. 
In addition to the Liberal and Conservative candidates who received the coupon, some letters were also sent to Labour supporters of the Coalition (although most were repudiated by the official Labour Party)  and some to members of the patriotic, working class party the National Democratic Party.
As Margaret Cole’s memoir of the time makes clear, many competent and patriotic candidates who did not receive the coupon, including sitting Liberal and Labour MPs, found themselves categorised as somehow anti-war or pacifist as a result.  Percy Harris, who had been MP for Harborough since 1916 recorded that once the coupon had been allocated to his Conservative opponent it was interpreted as a personal reflection upon him by his constituents who assumed he must have done something wrong for the Liberal Prime Minister to be seen offering his open support to a rival. 
Most historians have since agreed that the coupon essentially sealed the fate of those Liberals who were not fortunate enough to receive the Coalition's backing. Those Liberals that Lloyd George chose to abandon were left defenceless against Coalition candidates, who had a full claim on the spirit of national unity and patriotism that characterised Britain's war weary mood following the end of hostilities. 
The election result was catastrophic for these Asquithian Independent Liberals, who were decimated in the Coupon election. Only 28 were returned, and even Asquith lost the seat he had held in East Fife since the 1886 general election. 
The Liberal Party was one of the two major political parties in the United Kingdom, along with the Conservative Party, in the 19th and early 20th centuries. Beginning as an alliance of Whigs, free trade–supporting Peelites and reformist Radicals in the 1850s, by the end of the 19th century it had formed four governments under William Gladstone. Despite being divided over the issue of Irish Home Rule, the party returned to government in 1905 and won a landslide victory in the 1906 general election.
Herbert Henry Asquith, 1st Earl of Oxford and Asquith,, generally known as H. H. Asquith, was a British statesman and Liberal Party politician who served as Prime Minister of the United Kingdom from 1908 to 1916. He was the last Liberal prime minister to command a majority government, and the most recent Liberal to have served as Leader of the Opposition. He played a major role in the design and passage of major liberal legislation and a reduction of the power of the House of Lords. In August 1914, Asquith took Great Britain and the British Empire into the First World War. During 1915, his government was vigorously attacked for a shortage of munitions and the failure of the Gallipoli Campaign. He formed a coalition government with other parties but failed to satisfy critics, was forced to resign in December 1916 and never regained power.
The 1922 United Kingdom general election was held on Wednesday 15 November 1922. It was won by the Conservative Party, led by Bonar Law, which gained an overall majority over the Labour Party, led by J. R. Clynes, and a divided Liberal Party.
The 1918 United Kingdom general election was called immediately after the Armistice with Germany which ended the First World War, and was held on Saturday, 14 December 1918. The governing coalition, under Prime Minister David Lloyd George, sent letters of endorsement to candidates who supported the coalition government. These were nicknamed "Coalition Coupons", and led to the election being known as the "coupon election". The result was a massive landslide in favour of the coalition, comprising primarily the Conservatives and Coalition Liberals, with massive losses for Liberals who were not endorsed. Nearly all the Liberal MPs without coupons were defeated, including party leader H. H. Asquith.
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