HMS Iron Duke was a battleship of the Royal Navy, the lead ship of her class, named in honour of Arthur Wellesley, 1st Duke of Wellington (famous for his victory at the Battle of Waterloo). She served as the flagship of the Grand Fleet during World War I, including at the Battle of Jutland. For the majority of the Great War she was based with the rest of the Grand Fleet at Scapa Flow. She was used in a secondary role throughout the Second World War before being scrapped in 1948