British Left left-wing party in the UK, by membership, is the Green Party of England and Wales. , membership was 45,643. The party has one Member of Parliament, Caroline Lucas, who was a Co-Leader of the Green Party of England & Wales; and was first elected as the MP for Brighton Pavilion at the 2010 general election. The other two political parties on the left and with representation in parliament are the centre-left Scottish National Party (SNP) and the left-wing Plaid Cymru. The SNP are only active in Scotland and Plaid are only active in Wales. The SNP has 35 MPs and
Leader of the Labour Party (UK) From oldest to youngest: Leader of the Labour Party (UK) The Leader of the Labour Party is the most senior political figure within the Labour Party in the United Kingdom. Since 12 September 2015, the office has been held by Jeremy Corbyn; who has represented the constituency of Islington North since 1983. Harriet Harman was the Deputy Leader of the Labour Party and also Acting Leader since the resignation of Ed Miliband on 8 May 2015 following Labour's defeat at the 2015 general election. On 12 September 2015, she was replaced by Jeremy Corbyn, who won the Labour leadership election.