'BP' was the designation of Allied convoys (together with a numerical suffix) plying the route from Bombay, India, to ports of the Persian Gulf, and as such reciprocals of the 'PB' series (April 1941/February 1945).

The first of the series was BP.1 of 21/29 April 1941 from Bombay to Basra with the 3,284-ton British Bandra carrying 621 troops, 5,072-ton British Esperance carrying ammunition, 9,213-ton British Nevasa carrying 1,476 troops and 16,479-ton British Westernland carrying 2,232 troops, with escort provided by the 11,174-ton armed merchant cruiser Antenor. The series ended with BP.125 of 7/11 February 1945 from Bombay to Bandar Abbas with just two unescorted ships.