'Gang of Four', who had broken away from Labour to form the Social Democratic Party (SDP). When the SDP split in 1988, Sainsbury was among those who joined David Owen in forming a new 'continuing' SDP, where he remained until that party's dissolution in 1990. Although his nephew David also became a member of the 'continuing' SDP, his son John elected to take the Conservative whip when made a peer in 1989, thereby sitting in opposition to his father. References Sources Alan Sainsbury, Lord Sainsbury of Drury Lane, Sainsburyarchive.org.uk. Accessed 7 September 2022. External Links 1902 births 1998 deaths English people of Dutch-Jewish descent British business executives Life peers Alan Labour Party (UK) life peers Liberal Party (UK) parliamentary candidates Social Democratic Party (UK) life peers Jewish British politicians 20th-century British businesspeople Life peers created by Elizabeth II