This is my great-uncle, Lieutenant Clifford Stanley Clark, Royal Field Artillery - b 14th Feb 1898 d 30th May 1919. Clifford died of pneumonia whilst serving in the Army of occupation in Cologne, Germany. He was awarded the Military Cross on 26th July 1918.
This is his brother-in-law, Captain Edmund Walker, Cambridgeshire Regiment. Edmund was also awarded the Military Cross, in July 1917. He was awarded two bars to his MC over the course of the rest of WW1.