Admiral of the Fleet Sir Edward Hobart Seymour, was a Royal Navy officer. As a junior officer he served in the Black Sea during the Crimean War. He then took part in the sinking of the war-junks, the Battle of Canton and the Battle of Taku Forts during the Second Opium War and then saw action again at the Battle of Cixi during the Taiping Rebellion.

Admiral of the Fleet is a five-star naval officer rank and the highest rank of the Royal Navy, formally established in 1688. The five-star NATO rank code is OF-10, equivalent to a field marshal in the British Army or a Marshal of the Royal Air Force. Apart from honorary appointments, no new admirals of the fleet have been named since 1995, and no honorary appointments have been made since 2014.