- The Rt Hon. Baroness Virginia Bottomley, PC, DLFormerly Secretary of State for Health and for National Heritage
- The Rt Hon David CameronFormerly Prime Minister of the United Kingdom (2010-2016). Honorary Governor, The Ditchley Foundation.
- Mr Robert Cooper, KCMG, MVOFormerly Counsellor, EEAS, Council of the European Union.
- Sir Simon Fraser, GCMGManaging Partner, Flint Global Ltd. Formerly Permanent Under Secretary and Head of the Diplomatic Service.
- The Rt Hon. Sir Lawrence Freedman, KCMG, CBE, FBA, FKCEmeritus Professor of War Studies, King's College London.
- Professor Timothy Garton Ash, CMGProfessor of European Studies, University of Oxford and Isaiah Berlin Professorial Fellow, St Antony's College, Oxford.
- Professor Sir Malcolm Grant, CBE, MA, LLDChancellor, University of York. Former Chairman, NHS England.
- The Rt Hon Lord Hurd of Westwell, CH, CBEFormerly Secretary of State for Foreign and Commonwealth Affairs.
- Mr Will HuttonPrincipal, Hertford College.
- Lady Judge, CBEChairman, Astana Financial Services Authority. Chairman, Cifas. Chairman, SNOMED International.
- The Honorable Roy MacLaren, PCFormerly Canadian High Commissioner to the United Kingdom and Minister of Trade.
- The Rt Hon Sir John Major, KG, CHFormer Prime Minister of the United Kingdom and Northern Ireland.
- The Rt Hon David MilibandPresident and CEO, International Rescue Committee. Formerly Secretary of State for Foreign and Commonwealth Affairs.
- Mr Glen R MorenoDirector, Fidelity International Limited.
- Mr Edward Mortimer, CMGFormerly Chief Speechwriter and Director of Communications to the Secretary General of the United Nations.
- Sir Richard Mottram, GCBVisiting Professor, LSE; formerly Permanent Secretary, UK Civil Service.
- Judge Hisashi OwadaFormerly President and Judge at the International Court of Justice.
- The Rt Hon Lord Patten of Barnes, CHChancellor of Oxford University. Formerly Member of the European Commission and Governor of Hong Kong.
- The Rt Hon. Baroness Prashar of Runnymede, CBEFormerly Chair of the Judicial Appointment Commission First Civil Service Commissioner.
- Lord Rees of Ludlow, OM, FRS, Hon. FBAAstronomer Royal. Formerly Master, Trinity College, Cambridge University.
- The Lord Ricketts, GCMG GCVOFormer Permanent Secretary in the Foreign Office, National Security Adviser and Ambassador to France
- The Rt Hon Sir Malcolm Rifkind, KCMG, QCFormerly Secretary of State for Foreign and Commonwealth Affairs.
- Sir John Sawers, GCMGExecutive Chairman, Newbridge Advisory. Formerly Chief of MI6 (2009-14).
- The Rt Hon Jack StrawFormerly Foreign Secretary, Home Secretary and Lord Chancellor
- Sir Kevin Tebbit, KCB, CMGFormer diplomat and Permanent Secretary, Ministry of Defence.
- Sir Crispin Tickell, GCMG, KCVOFormerly United Kingdom Permanent Representative to the United Nations.
- Sir John Vereker, KCB, KStJIndependent Director, AXA-XL London Companies.
- Mr Simon Webb, FICEExecutive Director, The Nichols Group.
- The Rt Hon. the Lord Willetts, FRSExecutive Chair, Resolution Foundation; Visiting Professor, King's College, London. Formerly Minister for Universities and Science.
- The Rt Hon Baroness Williams of CrosbyFormerly UK Secretary of State for Education and Science. Emeritus Board Member, the Nuclear Threat Initiative (NTI), Washington DC.
- Professor Ngaire WoodsDean, The Blavatnik School of Government.