Brighton Pavilion (UK Parliament constituency) Pavilion for the Greens at the 2017 general election. Brighton Pavilion (UK Parliament constituency) Brighton Pavilion is a constituency represented in the House of Commons of the UK Parliament since 2010 by Caroline Lucas of the Green Party; who on being elected, became the first MP for that party in the United Kingdom. 1950–1983: The County Borough of Brighton wards of Hollingbury, Montpelier, Patcham, Pavilion, Preston, Preston Park, Regency, St Nicholas, St Peter's, and West. 1983–1997: The Borough of Brighton wards of Hollingbury, Patcham, Preston, Regency, St Peter's, Seven Dials, Stanmer, and Westdene. 1997–2010: The Borough of Brighton wards of
Green Party of England and Wales of the London Assembly. Brighton Pavilion was the Green Party's first and only parliamentary seat to date, won at the 2010 general election and held in 2015 and 2017. As with other small parties, representation at the House of Commons has been hindered by the first-past-the-post voting system. The party's first life peer was Baron Beaumont of Whitley, who left the Liberal Democrats and joined the Green Party in 1999. He sat as a Green until his death in 2008. As of December 2015, Baroness Jones of Moulsecoomb is their only representative in the House of Lords. Since the first