Lloyd George once spoke of 'a very powerful combination - in its way the most powerful in the country'. Its proceedings were invariably conducted at Cliveden, the country estate of the fabulously wealthy Nancy and Waldorf Astor. Collectively dubbed 'God's Truth Ltd', the group included leading politicians, academics, writers and newspaper editors. Its pedigree impeccable, its social standing beyond reproach, its persuasive powers permeated the clubs...