Thank you all - we have a photo of Q Troop 2/2 Lovat Scouts which includes him. When serving with the Gordons, he won the Military Medal at Arras and was wounded twice. Having survived the War, Davie died of flu while serving in Germany in 1919. I was moved to see a specific refernce to his death and funeral in the War Diary - and again have photos of his funeral.
RWT