Acknowledgments This project would not have been possible without the assistance of the Nuffield Foundation. Their support has been generous and unstinting. Particular thanks are due to Jonathan Beynon and Monica Lloyd, who helped shape the Sourcebook from its early stages to its final form and contributed to the drafting of particular sections. Hernan Reyes and Camille Giffard also deserve a special mention for their extensive and perceptive comments on later drafts. Many others have given generously of their time during the preparation of this Sourcebook by sharing their expertise, providing practical and professional insight and by commenting on whole or part of drafts. Thanks are due to: Henrik Steen Andersen, Helen Bamber, Jamie Bennett, Francesca Cooney, Andrew Coyle, Kimmett Edgar, Neil Frazer, John Gale, Dougie Graham, Andy Flynn and the Mental Health Team at Woodhill CSC, Stuart Grassian, Adrian Grounds, Craig Haney, Alison Hannah, Morit Heitzler, Lucy Kralj, Juliet Lyon, Clive Meux, Marlies Morsink, Lars Moller, Mary Murphy, Patrick Owen, Paul Rock, Peter Scharff-Smith, Julian Sheather and Ann Somerville. Views expressed in the Sourcebook and any errors made in it are my own. Sharon Shalev October 2008