HMS Caerleon was a Hunt-class minesweeper built for the Royal Navy during World War I. Completed in 1919, the ship was sold for scrap in 1935.
The Aberdare sub-class were enlarged versions of the original Hunt-class ships with a more powerful armament. The ships displaced at normal load and at full load. They measured long overall with a beam of and a draught of . The ships' complement consisted of 74 officers and ratings.
The ships had two vertical triple-expansion steam engines, each driving one shaft using steam provided by two Yarrow boilers. The engines produced a total of and gave a maximum speed of . They carried a maximum of of coal which gave them a range of at .
The Aberdare sub-class was armed with a quick-firing (QF) gun forward of the bridge and a QF twelve-pounder (3-inch (76.2 mm)) anti-aircraft gun aft. Some ships were fitted with QF six-pounder () Hotchkiss guns or QF three-pounder () Hotchkiss guns in lieu of the twelve-pounder.
Carstairs, the first ship of her name in the Royal Navy, was built by Bow, McLachlan and Company at their shipyard in Paisley, Scotland with the name Cawsand. The ship was renamed Carstairs in 1918 and launched on 18 April 1919. She was renamed Dryad on 4 January 1924, but returned to Carstairs on 15 August. The ship was sold on 26 April 1935 to Thos. W. Ward in Grays, Essex, to be broken up.