The Rt Hon. Baroness Virginia Bottomley, PC, DL
Formerly Secretary of State for Health and for National Heritage
The Rt Hon David Cameron
Formerly Prime Minister of the United Kingdom (2010-2016). Honorary Governor, The Ditchley Foundation.
Mr Robert Cooper, KCMG, MVO
Formerly Counsellor, EEAS, Council of the European Union.
Sir Simon Fraser, GCMG
Managing Partner, Flint Global Ltd. Formerly Permanent Under Secretary and Head of the Diplomatic Service.
The Rt Hon. Sir Lawrence Freedman, KCMG, CBE, FBA, FKC
Emeritus Professor of War Studies, King's College London.
Professor Timothy Garton Ash, CMG
Professor of European Studies, University of Oxford and Isaiah Berlin Professorial Fellow, St Antony's College, Oxford.
Professor Sir Malcolm Grant, CBE, MA, LLD
Chancellor, University of York. Former Chairman, NHS England.
The Rt Hon Lord Hurd of Westwell, CH, CBE
Formerly Secretary of State for Foreign and Commonwealth Affairs.
Mr Will Hutton
Principal, Hertford College.
The Honorable Roy MacLaren, PC
Formerly Canadian High Commissioner to the United Kingdom and Minister of Trade.
The Rt Hon Sir John Major, KG, CH
Former Prime Minister of the United Kingdom and Northern Ireland.
The Rt Hon David Miliband
President and CEO, International Rescue Committee. Formerly Secretary of State for Foreign and Commonwealth Affairs.
Mr Glen R Moreno
Director, Fidelity International Limited.
Mr Edward Mortimer, CMG
Formerly Chief Speechwriter and Director of Communications to the Secretary General of the United Nations.
Sir Richard Mottram, GCB
Visiting Professor, LSE; formerly Permanent Secretary, UK Civil Service.
Judge Hisashi Owada
Formerly President and Judge at the International Court of Justice.
The Rt Hon Lord Patten of Barnes, CH
Chancellor of Oxford University. Formerly Member of the European Commission and Governor of Hong Kong.
The Rt Hon. Baroness Prashar of Runnymede, CBE
Formerly Chair of the Judicial Appointment Commission First Civil Service Commissioner.
Lord Rees of Ludlow, OM, FRS, Hon. FBA
Astronomer Royal. Formerly Master, Trinity College, Cambridge University.
The Lord Ricketts, GCMG GCVO
Former Permanent Secretary in the Foreign Office, National Security Adviser and Ambassador to France
The Rt Hon Sir Malcolm Rifkind, KCMG, QC
Formerly Secretary of State for Foreign and Commonwealth Affairs.
Sir John Sawers, GCMG
Executive Chairman, Newbridge Advisory. Formerly Chief of MI6 (2009-14).
The Rt Hon Jack Straw
Formerly Foreign Secretary, Home Secretary and Lord Chancellor
Sir Kevin Tebbit, KCB, CMG
Former diplomat and Permanent Secretary, Ministry of Defence.
Sir Crispin Tickell, GCMG, KCVO
Formerly United Kingdom Permanent Representative to the United Nations.
Sir John Vereker, KCB, KStJ
Independent Director, AXA-XL London Companies.
Mr Simon Webb, FICE
Executive Director, The Nichols Group.
The Rt Hon. the Lord Willetts, FRS
Executive Chair, Resolution Foundation; Visiting Professor, King's College, London. Formerly Minister for Universities and Science.
The Rt Hon Baroness Williams of Crosby
Formerly UK Secretary of State for Education and Science. Emeritus Board Member, the Nuclear Threat Initiative (NTI), Washington DC.
Professor Ngaire Woods
Dean, The Blavatnik School of Government.