Henry Campbell-Bannerman in the context of "Irish Home Rule"

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 Ewart 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. Under prime ministers Henry Campbell-Bannerman (1905–1908) and H. H. Asquith (1908–1916), the Liberal Party passed reforms that created a basic welfare state. Although Asquith was the party leader, its dominant figure was David Lloyd George.

Asquith was overwhelmed by his wartime role as prime minister and Lloyd George led a coalition that replaced him in late 1916. However, Asquith remained as Liberal Party leader. The split between Lloyd George's breakaway faction and Asquith's official Liberal faction badly weakened the party. The coalition government of Lloyd George was increasingly dominated by the Conservative Party, which finally ousted him as prime minister in 1922. The subsequent Liberal collapse was quick and catastrophic. With 400 MPs elected in the 1906 election; they had only 40 in 1924. Their share of the popular vote plunged from 49% to 18%. The Labour Party absorbed most of the ex-Liberal voters and then became the Conservatives' main rival.

David Lloyd George, 1st Earl Lloyd-George of Dwyfor (17 January 1863 – 26 March 1945) was Prime Minister of the United Kingdom from 1916 to 1922. A Liberal Party politician from Wales, he was known for leading the United Kingdom during the First World War, for social-reform policies, for his role in the Paris Peace Conference, and for negotiating the establishment of the Irish Free State.

Born in Chorlton-on-Medlock, Manchester, and raised in Llanystumdwy, Lloyd George gained a reputation as an orator and proponent of a Welsh blend of radical Liberal ideas that included support for Welsh devolution, the disestablishment of the Church of England in Wales, equality for labourers and tenant farmers, and reform of land ownership. He won an 1890 by-election to become the Member of Parliament for Caernarvon Boroughs, and was continuously re-elected to the role for 55 years. He served in Henry Campbell-Bannerman's cabinet from 1905. After H. H. Asquith succeeded to the premiership in 1908, Lloyd George replaced him as Chancellor of the Exchequer. To fund extensive welfare reforms, he proposed taxes on land ownership and high incomes in the 1909 People's Budget, which the Conservative-dominated House of Lords rejected. The resulting constitutional crisis was only resolved after elections in 1910 and passage of the Parliament Act 1911. His budget was enacted in 1910, with the National Insurance Act 1911 and other measures helping to establish the modern welfare state. He was embroiled in the 1913 Marconi scandal but remained in office and secured the disestablishment of the Church of England in Wales.

The Liberal government of the United Kingdom of Great Britain and Ireland that began in 1905 and ended in 1915 consisted of two ministries: the first led by Henry Campbell-Bannerman (from 1905 to 1908) and the final three by H. H. Asquith (from 1908 onwards).

The National Insurance Act 1911 (1 & 2 Geo. 5. c. 55) created National Insurance, originally a system of health insurance for industrial workers in Great Britain based on contributions from employers, the government, and the workers themselves. It was one of the foundations of the modern welfare state. It also provided unemployment insurance for designated cyclical industries. It formed part of the wider social welfare reforms of the Liberal governments of 1906–1915, led by Henry Campbell-Bannerman and H. H. Asquith. David Lloyd George, the Liberal Chancellor of the Exchequer, was the prime moving force behind its design, negotiations with doctors and other interest groups, and final passage, assisted by Home Secretary Winston Churchill.

The 1906 United Kingdom general election was held from 12 January to 8 February 1906. The Liberals under Henry Campbell-Bannerman won a landslide victory against a bewildered Conservative Party, in which its leader, Arthur Balfour, lost his seat; the party won the lowest number of seats it ever had in its history, a nadir unsurpassed until 2024. This particular landslide is now ranked alongside the 1924, 1931, 1945, 1983, 1997, 2001, and 2024 general elections as one of the largest landslide election victories.

The Labour Representation Committee was far more successful than at the 1900 general election and after the election would be renamed the Labour Party with 29 MPs and Keir Hardie as leader. The Irish Parliamentary Party, led by John Redmond, achieved its seats with a relatively low number of votes, as 73 candidates stood unopposed. This election was a landslide defeat for the Conservative Party and their Liberal Unionist allies, with the primary reason given by historians being the party's weakness after its split over the issue of free trade (Joseph Chamberlain had resigned from government in September 1903 in order to campaign for Tariff Reform, which would allow "preferential tariffs"). Many working-class people at the time saw this as a threat to the price of food, hence the debate was nicknamed "Big Loaf, Little Loaf". The Liberals' landslide victory of 125 seats over all other parties led to the passing of social legislation known as the Liberal reforms.

The 1895 United Kingdom general election was held from 13 July to 7 August 1895. The result was a Conservative parliamentary majority of 153.

William Gladstone had retired as prime minister the previous year, and Queen Victoria, disregarding Gladstone's advice to name Lord Spencer as his successor, appointed the Earl of Rosebery as the new prime minister. Rosebery's government found itself largely in a state of paralysis due to a power struggle between him and William Harcourt, the Liberal leader in the Commons. The situation came to a head on 21 June, when Parliament voted to dismiss Secretary of State for War Henry Campbell-Bannerman; Rosebery, realising that the government would likely not survive a motion of no confidence were one to be brought, promptly resigned as prime minister. Conservative leader Lord Salisbury was subsequently re-appointed for a third spell as prime minister, and promptly called a new election.

The 1900 United Kingdom general election was held between 26 September and 24 October 1900, following the dissolution of Parliament on 25 September. Also referred to as the Khaki Election (the first of several elections to bear this sobriquet), it was held at a time when it was widely believed that the Second Boer War had effectively been won (though in fact it was to continue for another two years).

The Conservative Party, led by Lord Salisbury with their Liberal Unionist allies, secured a large majority of 134 seats, despite having received only 5.6% more votes than Henry Campbell-Bannerman's Liberals. This was largely owing to the Conservatives winning 163 seats that were uncontested by others. The Labour Representation Committee, later to become the Labour Party, participated in a general election for the first time. However, it had only been in existence for a few months; as a result, Keir Hardie and Richard Bell were the only LRC Members of Parliament elected in 1900.

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 Ewart 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. Under prime ministers Henry Campbell-Bannerman (1905–1908) and H. H. Asquith (1908–1916), the Liberal Party passed reforms that created a basic welfare state. Although Asquith was the party leader, its dominant figure was David Lloyd George.

Asquith was overwhelmed by his wartime role as prime minister and Lloyd George led a coalition that replaced him in late 1916. However, Asquith remained as Liberal Party leader. The split between Lloyd George's breakaway faction and Asquith's official Liberal faction badly weakened the party. The coalition government of Lloyd George was increasingly dominated by the Conservative Party, which finally ousted him as prime minister in 1922. The subsequent Liberal collapse was quick and catastrophic. With 397 MPs elected in the 1906 election; they had only 40 in 1924. Their share of the popular vote plunged from 49% to 18%. The Labour Party absorbed most of the ex-Liberal voters and then became the Conservatives' main rival.