The Millennium Dome, colloquially referred to simply as The Dome, is the original name of a large dome-shaped building, originally used to house the Millennium Experience, a major exhibition celebrating the beginning of the third millennium. Located on the Greenwich Peninsula in South East London, England, the exhibition was open to the public from 1 January to 31 December 2000. The project and exhibition was the subject of considerable political controversy as it failed to attract the number of visitors anticipated, with recurring financial problems. All of the original exhibition and associated complex has since been demolished. The dome still exists, and it is now a key exterior feature of The O2. The Prime Meridian passes the western edge of the Dome and the nearest London Underground station is North Greenwich on the Jubilee Line.

The dome is one of the largest of its type in the world. Externally, it appears as a large white marquee with twelve 100 m-high yellow support towers, one for each month of the year, or each hour of the clock face, representing the role played by Greenwich Mean Time. In plan view it is circular, 365 m in diameter — one metre for each day of the year — with scalloped edges. It has become one of the United Kingdom's most recognisable landmarks. It can easily be seen on aerial photographs of London. Its exterior is reminiscent of the Dome of Discovery built for the Festival of Britain in 1951.

Anthony Charles Lynton Blair (born 6 May 1953) is a British Labour Party politician who served as the Prime Minister of the United Kingdom from 2 May 1997 to 27 June 2007. He was the Member of Parliament (MP) for Sedgefield from 1983 to 2007 and Leader of the Labour Party from 1994 to 2007. He resigned from all of these positions in June 2007.

Blair was elected Leader of the Labour Party in the leadership election of July 1994, following the sudden death of his predecessor, John Smith. Under his leadership, the party used the phrases "New Labour" and "New Socialism" to define its policy, and moved away from its support of state socialism since the 1960s and created a new version of the ethical socialism that was last pursued by Clement Attlee. Critics of Blair claim that "New Labour" did not adhere to socialism as claimed, and that it effectively advocated capitalism. Blair subsequently led Labour to a landslide victory in the 1997 general election. At 43 years old, he became the youngest Prime Minister since Lord Liverpool in 1812. In the first years of the New Labour government, Blair's government implemented a number of 1997 manifesto pledges, introducing the minimum wage, Human Rights Act and Freedom of Information Act, and carrying out devolution, establishing the Scottish Parliament, the National Assembly for Wales, and the Northern Ireland Assembly.