President Juan Manuel Santos Professor Colin Blakemore Sir Richard Branson President of the Republic of Colombia Professor of Neuroscience at the Entrepreneur and Founder of the University of Oxford and University Virgin Group President Fernando H. Cardoso of Warwick Former President of Brazil Yoko Ono Professor Sir Ian Gilmore Musician and artist President Lech Wałęsa Former President of the Royal College Former President of Poland, Nobel of Physicians Sean Parker Prize winner. Founding President of Facebook, Dr. Julian Huppert, MP Director of Spotify Professor Noam Chomsky Vice-Chair of the All-Party Professor of Linguistics and Parliamentary Group for Drug Policy Sting Philosophy at MIT Reform Musician and actor

Bernardo Bertolucci Professor Jonathan Wolff Louise Arbour, CC, GOQ Film Director Professor of Philosophy at UCL Former UN High-Commissioner for Human Rights Mario Vargas Llosa Professor Peter Singer Writer, Nobel Prize winner Professor of Bioethics at Princeton John Perry Barlow University Co-founder of the Electronic Frontier Thorvald Stoltenberg Foundation Former Minister of Foreign Affairs Gary Johnson (Norway) and UN High Republican US Presidential Maria Cattaui Commissioner for Refugees Candidate Former Secretary-General of the International Chamber of Commerce Michel Kazatchkine General Lord Ramsbotham United Nations Special Envoy for Former HM Chief Inspector of Prisons Jeremy Thomas HIV/AIDS Film Producer Peter Lilley, MP Professor Sir Anthony Leggett Former Secretary of State for Social Gilberto Gil Physicist, Nobel Prize winner Security Musician, former Minister of Culture, Brazil Javier Solana, KOGF, KCMG Tom Brake, MP Former EU High Representative for Co-chair of the Lib Dem Home Dr. Jan Wiarda the Common Foreign and Security Affairs, Justice and Equalities Former President of European Police Policy Parliamentary Policy Committee Chiefs

Wisława Szymborska President Jimmy Carter Professor Niall Ferguson Poet, Nobel Prize winner Former President of the United States, Professor of History at Harvard Nobel Prize winner University Professor John Polanyi Chemist, Nobel Prize winner President Ruth Dreifuss Lord Rees, OM Former President of Switzerland Astronomer Royal and former Professor Thomas C. Schelling President of the Royal Society Economist, Nobel Prize winner President Vicente Fox Former President of Mexico Professor Sir Partha Dasgupta Professor Lord Piot Professor of Economics at Cambridge Former UN Under Secretary-General

Caroline Lucas, MP President Aleksander Pavel Bém Leader of the Green Party and MP for Kwaśniewski Former Mayor of Prague Brighton Former President of Poland Professor Sir Peter Mansfield Economist, Nobel Prize winner Trudie Styler Desmond Tutu Actress and Producer Archbishop, Nobel Prize winner Professor Martin L. Perl Physicist, Nobel Prize winner Jeremy Irons George P. Schultz Oscar-Winning Actor Former US Secretary of State Professor David Nutt Former Chair of the Advisory Council Professor Robin Room Carlos Fuentes for the Misuse of Drugs School of Population Health, Novelist and essayist University of Melbourne Professor Trevor Robbins Professor A. C. Grayling Jaswant Singh Professor of Neuroscience at Master of the New College of the Former Minister of Defence, of Cambridge Humanities Finance, and for External Affairs, India Dr. Muhammed Abdul Bari, Nicholas Green, QC MBE Former Chairman of the Bar Council Asma Jahangir Former Secretary General of the Former UN Special Rapporteur on Muslim Council of Britain Sir Peregrine Worsthorne Arbitrary, Extrajudicial and Summary Former Editor of The Sunday Execution Carel Edwards Telegraph Former Head of the EU Commission’s John Whitehead Drug Policy Unit Professor Robert Grayling Former US Deputy Secretary of State Dean of School of Medicine, KCL Lord Mancroft Dr. Kary Mullis Chair of the Drug and Alcohol Dr. Patrick Aeberhard Chemist, Nobel Prize winner Foundation Former President of Doctors of the World Professor Kenneth Arrow Bob Ainsworth, MP Economist, Nobel Prize winner Former UK Secretary of State for President Otto Pérez Molina Defence President of the Republic of Guatemala Professor Sir Harold Kroto Chemist, Nobel Prize winner Lord MacDonald, QC President César Gaviria Former Head of the Crown Former President of Colombia Amanda Feilding Prosecution Service Director, the Beckley Foundation

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