Professor Mark Williams is Emeritus Professor of Clinical Psychology at Oxford University and former director of the Oxford Mindfulness Centre. He co-developed mindfulness-based cognitive therapy (MBCT), is co-author of the international bestseller Mindfulness: A practical guide to finding peace in a frantic world and The Mindful Way Through Depression, and author of Cry of Pain: Understanding suicide and the suicidal mind.

Dr Danny Penman is the bestselling author of Mindfulness: A practical guide to finding peace in a frantic world, co-written with Professor Mark Williams of Oxford University, and co-author of Mindfulness for Health with Vidyamala Burch. He is a qualified mindfulness teacher who first learned to meditate when he was 16. He is also a feature and comment writer for the Daily Mail, having previously worked for the Independent and the BBC. Danny has hosted mindfulness seminars for directors and senior figures from many leading companies. He is a frequent commentator on mindfulness for the BBC and various national newspapers.