 Complete the following phrase:  HMS Llewellyn was a that served with the Royal Navy. Laid down on 14 December 1912 as HMS Picton, the ship was renamed on 30 September 1913 under an Admiralty order to become one of the first alphabetical class destroyers, being launched on 30 October. On commissioning, the vessel joined the Third Destroyer Flotilla and operated as part of the Harwich Force during the First World War. The destroyer took part in the Battle of Heligoland Bight, as well as undertaking anti-submarine patrols and escort duties. It was during one of these patrols on 4 December 1916 that the vessel unsuccessfully attacked the German submarine . On 17 March 1917, the destroyer was struck in the bow by a torpedo launched by a German torpedo boat while rescuing survivors from the sunk destroyer , but returned to port safely by steaming backwards. With the 