The authors are especially grateful to all who made this book possible: to Professor Sir Timothy O’Shea for writing the foreword; to the authors of the case studies for their rich input, based as it is on substantial experience, knowledge and expertise over many years; to Nina Hughes, research assistant for the project, and to Sharon Holley for her help and support during the final stages; to the University of St Mark & St John for their support; to Peter Williams, copy editor; and to Chandos Publishing for their help in preparing the book.