The house flag of the Asiatic Steam Navigation Co. Ltd, London. A blue, white and blue triband with a five-pointed blue star on the centre stripe. The flag is made of a wool and synthetic fibre bunting. It has a cotton hoist and is machine sewn. A rope and wooden toggle is attached.

The Asiatic Steam Navigation Co. Ltd was formed in 1878, with Turner & Co. as managing agents to run steamships in the Bay of Bengal with its vessels primarily carrying cargo and local labour. The company lost many of its routes following the Second World War and Indian independence in 1947. The connection with Turner & Co. was broken in 1960 and P&O acquired a controlling interest in the company in 1961 in order to integrate the fleet more closely with the rest of P&O group.