Sing transferred to the 31st Infantry Battalion on 27 July 1916 at Tel-el-Kibir and sailed to England the following month. Following a brief period of training in England, he sailed for France and entered action on the Western Front in January 1917. He was wounded in action several times, and commended many times in reports by Allied commanders. In March 1917, he was wounded in the left leg and hospitalised in England. In May 1917, while recovering in Scotland, he met waitress Elizabeth A. Stewart (c. 1896–unknown), who was the daughter of Royal Navy cook George Stewart. The two were married on 29 June 1917 in Edinburgh. In July 1917, Elizabeth Sing's address was noted in records as 6 Spring Gardens, Stockbridge, Edinburgh.