Thank you John915 for providing a good comparison photo of Wilfred Owen & his Manchesters cap badge. Although I am not as yet back at base to re copy the photo resolution, the earlier advice that it was probably a Man.Reg badge has allowed me to research the surnames on the back of the original photo. Although it will probably take a lot more time to provide confirmations, it is very possible that 2 of those youngsters died in the Gallipoli fighting and one "at Sea". This latter may prove to be a casualty from Gallipoli dying on a Hospital ship. The 4th one of the Group appears in France/Flanders and died of wounds in 1917. The photograph was in the possession of a WW2 man - now deceased and his elderly sister is trying to find any family/families of the 4 men, so she can let them have the photo. Ray Phillips.
