This is thought to be a photograph of Langlois Pomeroy but this hasn't been confirmed

A/Sergeant Langlois Walter Pomeroy
Royal Garrison Artillery
Formerly 9th Bde. Royal Field Artillery

1914-15 Star
with clasp & roses

Born in 1888 at Vale, Guernsey. The son of William Wesley and Alice Pomeroy, née Priaulx

He died at Hendon, London in 1954