This is a study of one of the most important relationships in British political life. It offers a framework for understanding the internal relations of the Labour Party's often stormy relationship with the trade unions. It offers controversial answers to key questions surrounding the relationship - in what ways has the relationship changed since Kinnock became leader? How much power do union leaders wield? Can the block vote be reformed? How and why has the alliance survived so long? Is the relationship now moving towards divorce? Can and ought it be saved? This book takes a wider look at the Labour Party and the constraints and inhibitions which govern the behaviour of union leaders within it.