James Callaghan in the context of "Ministry of foreign affairs"

The secretary of state for the Home Department, more commonly known as the home secretary, is a senior minister of the Crown in the Government of the United Kingdom and the head of the Home Office. The position is a Great Office of State, making the home secretary one of the most senior and influential ministers in the government. The incumbent is a statutory member of the British Cabinet and National Security Council.

The position, which may be known as interior minister in other nations, was created in 1782, though its responsibilities have changed many times. Past office holders have included the prime ministers Lord North, Robert Peel, the Duke of Wellington, Lord Palmerston, Winston Churchill, James Callaghan and Theresa May. The longest-serving home secretary is Henry Addington, 1st Viscount Sidmouth, who held the post continuously for 9 years, 221 days. The shortest-serving home secretary is Grant Shapps, who served in the position for the final six days of the premiership of Liz Truss. In 2007, Jacqui Smith became the first female home secretary. The incumbent home secretary is Shabana Mahmood.

The secretary of state for the environment was a UK cabinet position, responsible for the Department of the Environment (DoE). Today, its responsibilities are carried out by the secretary of state for environment, food and rural affairs and the secretary of state for housing, communities and local government. The post was created by Edward Heath as a combination of the Ministry of Housing and Local Government, the Ministry of Transport and the Ministry of Public Building and Works on 15 October 1970. Thus it managed a mixed portfolio of issues: housing and planning, local government, public buildings, environmental protection and, initially, transport – James Callaghan gave transport its department again in 1976. It has been asserted that during the Thatcher government the DoE led the drive towards centralism, and the undermining of local government. Particularly, the concept of 'inner cities policy', often involving centrally negotiated public-private partnerships and centrally appointed development corporations, which moved control of many urban areas to the centre, and away from their, often left-wing, local authorities. The department was based in Marsham Towers, three separate tower blocks built for the separate pre-merger ministries, in Westminster.

In 1997, when Labour came to power, the DoE was merged with the Department of Transport to form the Department of the Environment, Transport and the Regions (DETR), thus, essentially, restoring the DoE to its initial 1970 portfolio. The titular mention of 'the Regions' referred to the government's pledge to create a regional government. In the wake of the 2001 foot and mouth crisis, the environmental protection elements of the DETR were split of and merged with the Ministry of Agriculture, Fisheries and Food (MAFF), to form the Department for Environment, Food and Rural Affairs (Defra). Meanwhile, the transport, housing and planning, and local and regional government aspects went to a new Department for Transport, Local Government and the Regions (DTLR). A year later the DTLR also split, with transport getting its own department and the rest going to the Office of the Deputy Prime Minister.

The shadow chancellor of the exchequer in the British Parliamentary system is the member of the Shadow Cabinet who is responsible for shadowing the chancellor of the exchequer. The title is given at the gift of the leader of the Opposition and has no formal constitutional role, but is generally considered the second-most senior position, unless a shadow deputy prime minister is chosen, on the opposition frontbench, after the leader. Past shadow chancellors include Harold Wilson, James Callaghan, Edward Heath, Geoffrey Howe, Kenneth Clarke, Gordon Brown, John McDonnell and Rachel Reeves.

The name for the position has a mixed history. It is used to designate the lead economic spokesman for the Opposition. The name 'Shadow Chancellor' has also been used for the corresponding position for the Liberal Democrats, the Liberal Democrat Treasury spokesperson. This was a source of humour for Chancellor Gordon Brown, who in 2005 played the two off against one another in Parliament, saying, "I, too, have a great deal of time for the shadow chancellor who resides in Twickenham [Liberal Democrat Vince Cable], rather than the shadow chancellor for the Conservative Party."