空軍元帥 (イギリス)
Prior to the creation of the RAF's officer rank titles in 1919, it was proposed that by analogy with field marshal, the highest rank title should be air marshal. It was later decided to use the rank of air marshal as an equivalent rank to lieutenant general and "marshal of the air" was put forward as the highest RAF rank. This new rank title was opposed by the then Chief of the Imperial General Staff, Sir Henry Wilson, who considered that the title was "ridiculous". However, the Chief of the Air Staff, Sir Hugh Trenchard was unmoved and the title was adopted.