The Conservative and Unionist Party, commonly the Conservative Party and colloquially known as the Tories, is one of the two main political parties in the United Kingdom, along with the Labour Party. It is the current governing party, having won the 2019 general election, and has been the primary governing party in the United Kingdom since 2010. The party sits on the right-wing to centre-right of the political spectrum. It encompasses various ideological factions including one-nation conservatives, Thatcherites, and traditionalist conservatives. The party holds the annual Conservative Party Conference, at which senior Conservative figures promote party policy.

Thatcherism is a form of British conservative ideology named after Conservative Party leader Margaret Thatcher that relates to not just her political platform and particular policies but also her personal character and style of management while in office. Proponents of Thatcherism are referred to as Thatcherites. The term has been used to describe the principles of the British government under Thatcher from the 1979 general election to her resignation in 1990, but it also receives use in describing administrative efforts continuing into the Conservative governments under John Major and David Cameron throughout the 1990s and 2010s. In international terms, Thatcherites have been described as a part of the general socio-economic movement known as neoliberalism, with different countries besides the United Kingdom sharing similar policies around expansionary capitalism.