HMAT Warilda, 7713 tons, was handed over by the Australian Government to the British in 1916 and converted to an Ambulance Transport ship. On the 3rd August 1918, on passage from Le Havre to Southampton, she was torpedoed by UC 49. She was fully laden with 614 patients, 70 RAMC staff and a crew of 117.

She was hit between the engine room and No 4 hold and the torpedo explosion not only killed the engineers but also 101 patients lying in an improvised ward in the hold. She sank by the stern and 113 patients, 1 nurse and 2 RAMC staff perished.