He served as a Non-Permanent Judge of the Hong Kong Court of Final Appeal between 2009 and 2023.

He was educated at Downside School and Trinity College, Cambridge from where he graduated in 1959 with a Bachelor of Arts degree in Classics and Law.

Lord Walker of Gestingthorpe served on the Honorary Editorial Board of the Warwick Student Law Review from its inception in 2010.

[3][4] He and nine other Lords of Appeal in Ordinary became Justices of the Supreme Court of the United Kingdom upon its inauguration on 1 October 2009.

Lord Walker of Gestingthorpe married Suzanne Diana Leggi in 1962.