text: William Shirer, an American reporter assigned to Berlin in the years leading to the Second World War, referred to Londonderry simply as "an all-out pro-Nazi."
  Between January 1936 and September 1938, Londonderry made six visits to Nazi Germany, the first lasting for three weeks, but a seventh invitation that had been accepted for March 1939 was abruptly declined by Londonderry after the Nazi occupation of Prague. From early 1936 onward, Londonderry's public statements about the Third Reich became markedly admiring and sympathetic. In March 1936, Leopold von Hoesch, the German ambassador in London in a report to Berlin called Londonderry "one of those on whom the German government relied for the right opinions". As part of his amateur diplomacy, at the end of May 1936 Londonderry invited in Joachim von Ribbentrop, the German Ambassador to the Court of St. James's, later the German foreign minister, to his ancestral home in Northern Ireland, Mount Stewart. Ribbentrop is reported to have landed in Newtownards with a "noisy gang of SS men" and the four-day visit became a national newspaper story.
  Londonderry entertained Ribbentrop for a further four days at his family home in County Durham, Wynyard Hall on 13–17 November and accompanied him to briefings with government officials in London.