His Majesty's Most Loyal Opposition

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His Majesty's Most Loyal Opposition, commonly known as the Official Opposition in the United Kingdom, is the main political opposition to His Majesty's Government. This is usually the political party with the second-largest number of seats in the House of Commons, as the largest party will usually form the government.

Since July 2024, the Official Opposition has been the Conservative Party, with outgoing prime minister Rishi Sunak serving as Leader of the Opposition until the Conservative Party leadership election in November 2024 when newly elected party leader Kemi Badenoch took over the position.