Our President in 1939 was:
The Right Hon. Lord Ponsonby
Dinner cancelled due to Second World War
Arthur Augustus William Harry Ponsonby, 1st Baron Ponsonby of Shulbrede (16 February 1871 – 23 March 1946), was a British politician, writer, and social activist. He was the third son of Sir Henry Ponsonby, Private Secretary to Queen Victoria, and the great-grandson of The 3rd Earl of Bessborough. The 1st Baron Sysonby was his elder brother.
Ponsonby is often quoted as the author of the dictum "When war is declared, truth is the first casualty", published in his book Falsehood in War-time, Containing an Assortment of Lies Circulated Throughout the Nations During the Great War (1928). However, he uses this phrase in quotation marks as an epigram at the start of the book and does not present it as his own words. Its likely origin is the almost identical line spoken in 1917 by the United States Senator Hiram Johnson: "The first casualty when war comes is truth".
Image and Text source: Wikipedia