Northern Ireland is a part of the United Kingdom in the north-east of the island of Ireland that is variously described as a country, province or region. Northern Ireland shares an open border to the south and west with the Republic of Ireland. At the 2021 census, its population was 1,903,175, making up around 3% of the UK's population and 27% of the population on the island of Ireland. The Northern Ireland Assembly, established by the Northern Ireland Act 1998, holds responsibility for a range of devolved policy matters, while other areas are reserved for the UK Government. The government of Northern Ireland cooperates with the government of Ireland in several areas under the terms of the Belfast Agreement. The Republic of Ireland also has a consultative role on non-devolved governmental matters through the British–Irish Governmental Conference (BIIG).

His Majesty's Government is the central executive authority of the United Kingdom of Great Britain and Northern Ireland. The government is led by the prime minister who selects all the other ministers. The country has had a Conservative-led government since 2010, with successive prime ministers being the then-leader of the Conservative Party. The prime minister and their most senior ministers belong to the supreme decision-making committee, known as the Cabinet.