Only the oldest 2 Officers have WW1 medal ribbons which gives the impression
this is 1930's & before the uniform change.
jim, I'm wondering if this was a slip of the metaphorical pen. There is only one officer here, the captain sitting behind the large cup. There are 3 LCpls, 3 Sergeants (one of whom has medal ribbons) a staff sergeant and a WO2 who is not a Company Sergeant Major, so if this is a shooting team maybe he is the QMSI responsible for skill at arms training. Junior and Senior NCOs are never referred to as officers, even though the word clearly appears in their title (there is one exception to that general rule: a soldier would be charged with striking a superior officer if he hit another soldier who was senior to him by rank, even if that was a non-commissioned rank).
