P4154/L4M, LT(A) H.Swayne RN (Pilot) and SUB LT(A)J.Buscall RNVR (Observer), No.815 SQN NAS, HMS Illustrious, Battle of Taranto. They needed to score a decisive victory, but could a formation of ageing biplane strike aircraft take on one of the most powerful naval fleets in the world?.