Four vessels of the Royal Navy have been named HMS Regulus, after the star:
HMS Regulus was a wooden fifth rate of 44 guns, launched at Northam in January 1785 and converted to a troopship in 1793. Because Regulus served in the navy's Egyptian campaign (8 March to 2 September 1801), her officers and crew qualified for the clasp "Egypt" to the Naval General Service Medal, which the Admiralty issued in 1847 to all surviving claimants. The ship was broken up in March 1816.HMS Regulus was the French privateer Regulus that HMS Princess Charlotte captured in December 1804; it is not clear that she ever served and she was last listed in 1806.HMS Regulus was a Rainbow-class submarine launched at Barrow-in-Furness in June 1930 and lost in December 1940, possibly sunk by a mine near Taranto, Southern Italy.HMS Regulus was an Algerine-class minesweeper launched at Toronto in September 1943. Originally to have been called HMCS Longbranch, the ship was sunk in January 1945 by a mine off Corfu.