History of the Green Party of England and Wales of Deputy Leader. The Green Party fielded more than 300 candidates for the 2010 general election. Caroline Lucas became the first Green candidate to gain a seat in Westminster, after being elected MP for Brighton Pavilion by a margin of 1,252 votes. The following week 600 new members had joined the Green Party bringing total membership to over 11,000. In previous years 600 new members was high for a whole year. On 24 May 2012, the six Green Party councillors elected to Stroud District Council formed a power sharing administration (a "constructive cooperation") with both the Labour Party and the
MPs first elected in 2010 to the 55th UK Parliament MPs first elected in 2010 to the 55th UK Parliament 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