This new edition incorporates revised guidance from H.M Treasury which is designed to promote efficient policy development and resource allocation across government through the use of a thorough, long-term and analytically robust approach to the appraisal and evaluation of public service projects before significant funds are committed. It is the first edition to have been aided by a consultation process in order to ensure the guidance is clearer and more closely tailored to suit the needs of users.

This marketing-leading textbook retains the engaging and scholarly approach of previous editions, while bringing the landscape of public law completely up-to-date. With text and materials integrated throughout and an accompanying author blogspot, this textbook is, quite simply, required reading for all students of public law.