 During the Second World War, "Leslie" served in the cruiser HMS "York" from 1939 to 1940 then transferred to the destroyer HMS "Harvester" in 1941.From 1942 to 1943 he served on the destroyer HMS "Volunteer".This was followed by service on the destroyers HMS "Cassandra" 1944 to 1945 and HMS "Chevron" from 1945 to 1946.