In the 1940s, de Courcy was part of a scheme dreamed up by some conservative members of the British royal court to return the Duke and Duchess of Windsor to Britain and establish a regency.
[5] Later the group supported appeasement of Nazi Germany as the best means of preserving the British Empire, and in that capacity de Courcy travelled Europe making high-level contacts[citation needed].
[6] At several points in his life de Courcy believed the British Security Service (MI5) was intercepting his mail and telephone communications, and he was indeed the subject of MI5 surveillance; The diary of General Alan Brooke, Chief of the Imperial General Staff through much of World War II, records that MI5 brought him report (30 September 1942) of a conversation overheard through a hidden microphone indicating that De Courcy possessed secret information about the impending invasion of French North Africa.
[7] In 1952 on the death of George VI he wrote to Winston Churchill suggesting Elizabeth II develop a closer relationship with the abdicated King Edward, now living abroad.
[9] In the 1960s, via a company called Sarsden Consolidated Properties, de Courcy planned a garden city development in Southern Rhodesia (now Zimbabwe).