Professor Alice Roberts is a writer, broadcaster, and President of Humanists UK. She is the bestselling author of eight popular science books including Evolution: The Human Story, the Incredible Unlikeliness of Being and Tamed: Ten Species that Changed Our World. Making her television debut on Time Team in 2001, she has become one of Britain's best-known broadcasters and has written and presented a huge range of television series for BBC2, BBC4 and Channel 4, including The Incredible Human Journey, Origins of Us and Ice Age Giants, and several Horizon programmes. Her humanist 'mini-sermons' on Twitter have been liked and shared many thousands of times.

Andrew Copson is the Chief Executive of Humanists UK and President of Humanists International. He has provided a humanist voice on many television and radio programmes and written on humanism for publications including The Economist, New Statesman, Guardian, Prospect, The Times and Buzzfeed. With AC Grayling, he edited the Wiley Blackwell Handbook of Humanism and his most recent book is Secularism: A Very Short Introduction. He has been the humanist contributor to many compendiums and anthologies of quotations such as Wisdom for Life and numerous resources for schools.