Brother of 376 Private John Colquhoun McLay.
Military Medal citation: "Recommended for meritorious behaviour at Pozieres. On the night of 8th August 1916 when, after succeeding in capturing the enemy's position, he showed great courage and coolness in removing wounded to places of safety, all the time being under heavy artillery and machine gun fire and even when he was wounded continued this work. When returning he assisted a wounded comrade across a fire swept zone though painfully wounded himself." (Awarded 29 November 1916)