Anthony Gueterbock, 18th Baron Berkeley

In 2019 Berkeley became Vice-Chairman of the All Party Parliamentary Group on Whistleblowing. He was named as Co-Chair when the group reconstituted in 2020. All current and former members of the group have been subject to criticism from some campaigners on whistleblowing law reform, questioning their transparency and accountability, following Sir Norman Lamb's resignation from the group.

Gueterbock inherited his maternal ancestors' ancient title of Baron Berkeley in 1992, succeeding his aunt Mary Foley-Berkeley, 17th Baroness Berkeley. Lord Berkeley additionally became Baron Gueterbock, of Cranford in the London Borough of Hillingdon, in 2000, but remains known in Parliament as Lord Berkeley. His life peerage enables him to continue sitting as a Labour peer in the House of Lords, following the ejection of the vast majority of hereditary peers in 1999; he was not elected a hereditary representative peer.

Since his introduction to the House of Lords in 1992, Lord Berkeley has served as Opposition Spokesperson for Transport 1996–97 and Opposition Whip 1996–97. He is the Secretary of the All-Party Parliamentary Cycling Group and has tabled many questions in the House of Lords on Transport policy, including about bicycles on trains. Berkeley has also tabled questions about police conduct with regards to civil liberties. Berkeley queried restrictions on peers bringing guests into the House of Lords during President Barack Obama's visit to London.

Appointed an OBE in 1989 "for services to the construction industry", Lord and Lady Berkeley divide their time between homes in London and Polruan, Cornwall.

Gueterbock was educated at Eton College, before going up to Trinity College, Cambridge, where he graduated as a BA (proceeding MA). He then took a career in civil engineering with George Wimpey plc as an engineer until 1985. For the next ten years he worked as an engineer for Eurotunnel 1985–95.

Anthony Fitzhardinge Gueterbock, 18th Baron Berkeley, Baron Gueterbock, OBE (born 20 September 1939), otherwise known as Tony Berkeley, is a British aristocrat and Labour parliamentarian.

His mother, The Hon. Cynthia Ella Foley (1909–1991), married 4 August 1937 Brigadier Ernest Gueterbock, after which she was styled The Hon. Mrs Gueterbock. The younger of the two daughters of the 16th Baroness Berkeley MBE, her elder sister succeeded as Mary, 17th Baroness Berkeley (died 1992).