Deputy Leader of the Labour Party (UK) of the Party until a new leader is elected. If a vacancy in the leadership occurs while the Labour Party is in government, then the Cabinet, in consultation with the National Executive Committee of the Labour Party, chooses a new leader, who serves until a new leader is elected. To date, the only Deputy Leaders who have gone on to become the elected leader of the Labour Party are Clement Attlee and Michael Foot. Margaret Beckett briefly served as Labour leader following the unexpected death of John Smith in 1994. Harriet Harman was leader after Gordon Brown resigned in 2010
Leader of the Green Party of England and Wales group. In September 2008 Caroline Lucas was elected as the party's first leader. Lucas was reelected in 2010 but chose not to stand in 2012, when Natalie Bennett was elected her successor. After Bennett stood down in 2016 Lucas returned as leader, this time sharing the position with Jonathan Bartley. Prior to 1992 six principal speakers were elected annually. The Female Principal Speaker post was won by Siân Berry, without a contest. The Female Principal Speaker post was won by Caroline Lucas, without a contest. Not all regions of the Green Party used the Principal Speaker system. In particular, the