In 1948, Clan Matheson (4) was sold to British & South American Steam Navigation Co Ltd and was renamed Harmodius. She was placed under the management of Houston Line Ltd. In 1951, she was sold to the Heron Steamship Co Ltd, London and renamed Claire T.

In 1953, she was sold to the Romney Steamship Co Ltd, serving until 1955 when she was purchased by the MoT and renamed Empire Claire. As part of Operation Sandcastle, she was loaded with obsolete war materiel which included confiscated German munitions containing Tabun.

Loaded with 16,000 bombs, Empire Claire was towed out of Stranraer on 27 July 1955. She was scuttled that day at 56°30′N 12°00′W