Next of kin address 6 Gibson Street Ipswich England Mother Henrietta Brown Father John Brown More info Jack Brown lost his life in HM Submarine K17 was sunk on 31 January 1918 during the night time fleet exercises later known as the Battle of May Island (Operation E.C.1) when she was attached to the 13th Submarine Flotilla. HMS Fearless ploughed into K17 at the head of a line of submarines. She sank in about 8 minutes with the loss of all hands