The fifty-fifth Parliament of the United Kingdom was the legislature of the United Kingdom following the 2010 general election of members of parliament (MPs) to the House of Commons. Parliament, which consists of the House of Lords and the elected House of Commons, was convened on 25 May 2010 at the Palace of Westminster by Queen Elizabeth II. It was dissolved on 30 March 2015, being 25 working days ahead of the 2015 general election on 7 May 2015.
The election saw each of Parliament's 650 constituencies return one MP to the House of Commons. The Conservative Party, led by David Cameron, became the single largest party, though without an overall majority. This resulted in a hung parliament. A coalition agreement was then formed following negotiations with Liberal Democrats and their leader Nick Clegg. John Bercow resumed his role as Speaker of the House of Commons. In September 2010, Ed Miliband won a Labour Party leadership vote to succeed Gordon Brown as permanent Leader of the Opposition.