RN Submarines - May 1st

1916	W2	Submarine HMS W2 completed
1916	E54	Submarine HMS E54 completed
1916	G8	Submarine HMS G8 launched
1917	E40	Submarine HMS E40 completed
1917	L55	Submarine HMS L55 laid down
1919	H42	Submarine HMS H42 completed
1929	Oswald	Submarine HMS Oswald completed
1935	Rorqual	Submarine HMS Rorqual laid down
1940	Narwhal	HMS Narwhal torpedoes and sinks the German troop transport Buenos Aires and torpedoes and damages the German troop transport Bahia Castillo in the Kattegat about 20 nautical miles north of Anholt, Denmark.
1940	Narwhal	HMS Narwhal lays minefield FD 6 (50 mines) in the Kattegat.
1941	HMS Graph	Commissioned as German U-570, later captured by the British
1941	HMS Upholder	HMS Upholder torpedoes and sinks the German merchants Arcturus and Leverkusen off Kerkennah, Tunisia.
1944	Untiring	HMS Untiring torpedoes and sinks the German merchant Siena off Port Vendres, southern France.
1945	HMS Statesman	HMS Statesman sinks a small Japanese vessel in the Strait of Malacca.  Barrow Submarine Association