 Upon the Allied Forces' invasion of Normandy in June, the Nazis relieved de Foy of his position.In part, this was driven by the rumours that he was "London's man", having made contact, according to post-war records, with the Belgian Resistance via both Walter Ganshof van der Meersch and William Ugeux.After Robert Jan Verbelen was made head of the "De Vlag Veiligheidscorps", a Nazi SS security force in Belgium, an attempt on the life of de Foy failed.