HMS VengefulHMS Vengeful was a Second World War British submarine of the V class.ConstructionVengeful was built at Vickers Armstrong, Barrow-in-Furness, U.K. between July 1943 and July 1944.Service historyVengeful served in the RN from October 1944 to April 1945.Greek serviceVengeful was lent to the Greek Navy from April 1945 until 1957 where she served as Delfin.