Provisional Irish Republican Army in the context of "Improvised explosive device"

United Ireland (Irish: Éire Aontaithe), also referred to as Irish reunification or a New Ireland, is the proposition that all of Ireland should be a single sovereign state. At present, the island is divided politically: the sovereign state of Ireland (legally described also as the Republic of Ireland) has jurisdiction over the majority of Ireland, while Northern Ireland, which lies entirely within (but consists of only 6 of 9 counties of) the Irish province of Ulster, is part of the United Kingdom. Achieving a united Ireland is a central tenet of Irish nationalism and Republicanism, particularly of both mainstream and dissident republican political and paramilitary organisations. Unionists support Northern Ireland remaining part of the United Kingdom and oppose Irish unification.

Ireland has been partitioned since May 1921, when the Government of Ireland Act 1920 came into effect, creating two separate jurisdictions—Southern Ireland and Northern Ireland—within the United Kingdom. Southern Ireland never fully functioned and was soon replaced by the Irish Free State in 1922, which became independent, while Northern Ireland opted to remain part of the UK. The Anglo-Irish Treaty, which led to the establishment in December 1922 of a dominion called the Irish Free State, recognised partition, but this was opposed by anti-Treaty republicans. When the anti-Treaty Fianna Fáil party came to power in the 1930s, it adopted a new constitution which claimed sovereignty over the entire island. The Irish Republican Army (IRA) had a united Ireland as its goal during the conflict with British security forces and loyalist paramilitaries from the 1960s to the 1990s known as The Troubles. The Good Friday Agreement signed in 1998, which ended the conflict, acknowledged the legitimacy of the desire for a united Ireland, while declaring that it could be achieved only with the consent of a majority of the people of both jurisdictions on the island, and providing a mechanism for ascertaining this in certain circumstances.

The 1996 Manchester bombing was an attack carried out by the Provisional Irish Republican Army (IRA) on 15 June 1996. The IRA detonated a 1,500-kilogram (3,300 lb) lorry bomb on Corporation Street in the centre of Manchester, England. It was the biggest bomb detonated in Great Britain since the Second World War. It targeted the city's infrastructure and economy and caused significant damage, estimated by insurers at £700 million (equivalent to £1.3 billion in 2023), a sum surpassed only by the 1993 Bishopsgate bombing, also by the IRA.

At the time, England was hosting the Euro '96 football championship and a Russia vs. Germany match was scheduled to take place in Manchester the following day. The IRA sent telephoned warnings about 90 minutes before the bomb detonated. At least 75,000 people were evacuated from the region, but the bomb squad were unable to defuse the bomb in time. More than 200 people were injured, but there were no fatalities despite the strength of the bomb, which has been largely credited to the rapid response of emergency services in evacuating the city centre.

The Northern Ireland peace process includes the events leading up to the 1994 Provisional Irish Republican Army (IRA) ceasefire, the end of most of the violence of the Troubles, the Good Friday Agreement of 1998, and subsequent political developments.

Dissident republicans (Irish: poblachtach easaontach) are Irish republicans who do not support the Northern Ireland peace process. The peace agreements followed a 30-year conflict known as the Troubles, in which over 3,500 people were killed and 47,500 injured, and in which republican paramilitary groups such as the Provisional Irish Republican Army waged a campaign to bring about a united Ireland. Negotiations in the 1990s led to a Provisional IRA ceasefire in 1994 and to the Good Friday Agreement of 1998. Mainstream republicans, represented by Sinn Féin, supported the Agreement as a means of achieving Irish unity peacefully. Dissidents saw this as an abandonment of the goal of an independent Irish republic and acceptance of partition. They hold that the Northern Ireland Assembly and Police Service of Northern Ireland (PSNI) are illegitimate and see the PSNI as a British paramilitary police force.

Some dissident republican political groups, such as Republican Sinn Féin and the 32 County Sovereignty Movement, support political violence against the British security forces and oppose the Provisional IRA's 1994 ceasefire; other groups, such as the Irish Republican Socialist Party, wish to achieve their goals only through peaceful means.

30 St Mary Axe, previously known as the Swiss Re Building, is a commercial skyscraper in London's primary financial district, the City of London. It is nicknamed The Gherkin after the vegetable of the same name. It was completed in December 2003 and opened in April 2004. With 41 floors, it is 180 metres (591 ft) tall and stands on the sites of the former Baltic Exchange and Chamber of Shipping, which were extensively damaged in 1992 in the Baltic Exchange bombing by a device placed by the Provisional IRA in St Mary Axe, a narrow street leading north from Leadenhall Street.

After plans to build the 92-storey Millennium Tower were dropped, 30 St Mary Axe was designed by Foster + Partners and the Arup Group. It was built by Skanska; construction started in 2001.

Norris Dewar McWhirter CBE (12 August 1925 – 19 April 2004) was a British writer, right-wing political activist, co-founder of The Freedom Association, and a television presenter. He and his twin brother Ross were known internationally for founding the reference book The Guinness Book of Records (known since 2000 as Guinness World Records) which they wrote and updated annually together between 1955 and 1975. After Ross's assassination by the Provisional Irish Republican Army (IRA), Norris carried on alone as editor.

Alan Ross McWhirter (12 August 1925 – 27 November 1975) was, with his twin brother, Norris, the cofounder of the 1955 Guinness Book of Records (known since 2000 as Guinness World Records) and a contributor to the television programme Record Breakers. He was assassinated by the Provisional Irish Republican Army (IRA) in 1975.

The Grand Brighton Hotel is a Victorian seafront hotel in Brighton on the south coast of England. Designed by John Whichcord Jr. and built in 1864 by Lewis Glenton, it was intended for members of the upper classes visiting the town and remains one of Brighton's most expensive hotels.

During the 1984 Conservative Party conference the hotel was bombed by the Provisional Irish Republican Army (IRA) in an attempt to assassinate the Prime Minister, Margaret Thatcher.