The house flag of London Court Line Ltd. A rectangular white flag bearing a black tower and crescent. The flag is made of a machine sewn, wool and synthetic fibre bunting. The tower motif and the hoist are made of cotton fabric. A rope and toggle is attached. The Court Line Group purchased tankers from 1963 and these carried a blue house flag with a bird design.

The line was a tramp shipping company founded in 1905 by Philip Edward Haldinstein and based on London. His ships were all called after country houses with the suffix 'Court'. The fleet expanded greatly in the 1920s and was badly affected by the depression, many vessels being laid up. The company moved into bulk carriers in the 1960s and tankers. The company changed its naming scheme with new vessels having the prefix 'Halcyon' and also its livery. The group's diversified interests in airlines, package holidays, shipbuilding and repairing led to cash flow problems. As a result it went into liquidation in 1974.