Chief Whip of the Labour Party

A chief whip of the Labour Party oversees the whipping system in the Labour Party, and is responsible for ensuring that Labour members of Parliament (MPs) and Labour peers attend and vote in the Parliament of the United Kingdom in the way desired by the party leadership. The two chief whips, one in the House of Commons, and one in the House of Lords, also help to organise their party's contribution to parliamentary business.

Source: Wikipedia — Chief Whip of the Labour Party (CC BY-SA 4.0)