'LM' was the designation of Allied convoys (together with a numerical suffix) plying the route from Lagos, Nigeria, to Matadi, Congo (July/September 1943).

The first of these convoys was LM.1 of 10/14 July 1943 with the 7,886-ton British Collegian, 8,351-ton Belgian Elisabethville and 8,351-ton Belgian Thysville, and the last was LM.4 of 29 August/2 September 1943 with the 8,078-ton British Daphnella on her way to Bahia, and 8,351-ton Belgian Thysville.