World Economic Conference organising committee sanction tariff truce at Foreign Office . A meeting of the eight powers which constitute the Organising Committee of the Economic Conference was called in London to give formal sanction to the terms of the tariff truce already agreed upon by Great Britain and America . The meeting took place at the Foreign Office . Photo shows , left to right ; Mr Norman Davies , US Ambassador at large to Europe , Herr von Hoesch , German Ambassador to London leaving the Foreign Office . 12 May 1933