2010 United Kingdom general election support of UKIP to force a hung parliament. The Green Party of England and Wales voted to have a position of leader for the first time; the first leadership election was won by Caroline Lucas, who successfully contested the constituency of Brighton Pavilion. In addition, a new loose coalition, Trade Unionist and Socialist Coalition (TUSC), contested a general election for the first time. TUSC was a grouping of left wing parties that participated in the 2009 European Parliament elections under the name of No2EU; members included the Socialist Workers Party, the Socialist Party, the Socialist Alliance, Socialist Resistance, and is
Brighton Pavilion (UK Parliament constituency) and former union worker, as their candidate in June 2007. This meant that, distinctively, all of the four leading parties in the constituency had female candidates. In 2010, Labour's share of the vote fell by 6.5%, and Lucas, by then leading the Green Party, won the seat. In contrast to national results, the Conservative and Liberal Democrat share of the vote fell. Lucas retained the seat for the Green Party at the 2015 general election with an increased majority. Purna Sen, who held senior roles at the Commonwealth, LSE and Amnesty International, was selected to contest the seat for Labour.