The Royal Mail Steam Packet Company was a British shipping company founded in London in 1839 by a Scot, James MacQueen. The line's motto was Per Mare Ubique. After a troubled start, it became the largest shipping group in the world in 1927 when it took over the White Star Line. The company was liquidated and its assets taken over by the newly formed Royal Mail Lines in 1932 after financial trouble and scandal; over the years RML declined to no more than the name of a service run by former rival Hamburg Süd.

RMS Asturias was a Royal Mail Steam Packet Company ocean liner that was built in Ireland in 1908 and scrapped in Japan in 1933. She was a Royal Mail Ship until 1914, when on the eve of the First World War the British Admiralty requisitioned her as a hospital ship.