Mark Williams is Professor of Clinical Psychology at the University of Oxford and Wellcome Trust Principal Research Fellow at the University of Oxford. He co-developed MBCT and is co-author of the international best-seller The Mindful Way Through Depression. He features regularly on Radio 4 and is an internationally renowned speaker.. Dr Danny Penman is a feature and comment writer for the Daily Mail. He has a PhD in biochemistry and has worked for The Independent and the BBC.