Donald Anderson, Baron Anderson of Swansea is a Welsh Labour politician, who was one of the longest-serving Members of Parliament in recent years, his service totalling 34 years. Since 2005, he has served as a Labour peer in the House of Lords.

Welsh Labour, formerly known as the Labour Party in Wales, is an autonomous section of the United Kingdom Labour Party in Wales and the largest party in modern Welsh politics. Welsh Labour and its forebears have won a plurality of the Welsh vote at every UK general election since 1922, every Assembly and Senedd election since 1999, and all elections to the European Parliament in the period 1979–2004 and in 2014. Welsh Labour holds 22 of the 40 Welsh seats in the UK Parliament, 30 of the 60 seats in the Welsh Senedd and 576 of the 1,264 councillors in principal local authorities including overall control of 10 of the 22 principal local authorities.