The Thiepval Memorial

http://www.greatwar.co.uk/somme/memorial-thiepval.htm

The Thiepval Memorial to the Missing of the Somme battlefields bears the names of 72,194 officers and men of the United Kingdom and South African forces, who died with no known grave. Designed by Sir Edwin Lutyens,it was built between 1928 and 1932 and unveiled by the Prince of Wales, in the presence of the President of France, on 1 August 1932.

Our Gartcosh Laddie's name is inscribed at Thiepval - here you can see the memorial reference ( 15 B)