Dame Margaret Mary Beckett is a British politician who has served as the Member of Parliament (MP) for Derby South since 1983. A member of the Labour Party, she became Britain's first female Foreign Secretary in 2006 and served in the Cabinet of Prime Minister Tony Blair throughout his tenure. Deputy Leader of the Opposition and Deputy Leader of the Labour Party from 1992 to 1994, Beckett briefly served as Leader of the Opposition and Acting Leader of the Labour Party following John Smith's death in 1994.

The leader of the Labour Party is the highest position within the United Kingdom's Labour Party. The current holder of the position is Keir Starmer, who was elected to the position on 4 April 2020, following his victory in the party's leadership election.