The National Liberal Party, known until 1948 as the Liberal National Party, was a liberal political party in the United Kingdom from 1931 to 1968. It broke away from the Liberal Party on the issue of abandoning Free trade and supporting protectionism, and later co-operated and merged with the Conservative Party.

In the United Kingdom, the word liberalism can have any of several meanings. Scholars primarily use the term to refer to classical liberalism. The term can also mean economic liberalism, social liberalism or political liberalism. It can simply refer to the politics of the Liberal Democrats, a UK party formed from the merger of two centrist parties in 1988. Liberalism can occasionally have the imported American meaning; however, the derogatory connotation is much weaker in the UK than in the US, and social liberals from both the left and right wing continue to use liberal and illiberal to describe themselves and their opponents, respectively.