A British naval ensign. It was used as a battle ensign by HMS 'Chester' 1915 at the Battle of Jutland 31 May 1916. It is made of wool bunting and is machine-sewn. A rope and two Inglefield clips are attached and there are eyelets in the hoist.

Royal Naval vessels wore two ensigns in action in case one was shot away. As the German Imperial ensign was also white, a Union Flag was also flown in battle to avoid confusion with enemy ships from 11 January 1916. During the battle 'Chester' was engaged by a squadron of German light cruisers, among her casualties was the firesetter of the forecastle gun, Boy First Class, John Travers Cornwall. He died of his injuries and was granted a posthumous Victoria Cross, the youngest person ever awarded one.