HMHS Glenart Castle (His Majesty's Hospital Ship) was a steamship originally built as Galician in 1900 for the Union-Castle Line.

[2] Glenart Castle subsequently suffered damaged when she struck a mine in the English Channel 8 nautical miles (15 km; 9.2 mi) northwest of the Owers Lightship on 1 March 1917.

Upon hearing that the boiler room and Number 4 hold were flooding, Captain Day ordered the ship to be evacuated.

On 25 February 1918, Glenart Castle left Newport, South Wales, heading towards Brest, France, to collect patients.

John Hill — a fisherman on Swansea Castle — remembered "I saw the Hospital Ship with green lights all around her – around the saloon.

[1] The blast destroyed most of the lifeboats, while the subsequent pitch of the vessel hindered attempts to launch the remaining boats.

He was subsequently identified as Royal Army Medical Corps (RAMC) Private Samuel "Harry" Lund.

Ninety-five of 120 crew died, including Captain Bernard Burt who had given the order "Every Man For Himself" before he was last seen retiring to the chart room.

The body of a junior officer of Glenart Castle was recovered from the water close to the position of the sinking.

[15] Kapitänleutnant Wilhelm Kiesewetter — the commander of UC-56[16] — was arrested after the war on his voyage back to Germany and interned in the Tower of London.

[18] The Scottish military charity Glen Art was founded in 2013 by Fiona MacDonald in honour of her great aunt nurse Mary McKinnon who died while serving on the ship.

In February 2018, Glen Art held a memorial concert in Arisaig Scotland commemorating the centenary of the sinking of HMHS Glenart Castle and nurse McKinnon’s death.