Many thanks Matt. It is interesting to see that his rank is given as Sgt, as I said before I do not really understand why it has been entered on his 1914-15 Star MiC as it could have no bearing on the naming on the Star. Is there anything different regarding his rank at disembodiment on the BWM and VM roll?
One possible reason for his apparent demotion is that he was holding a post for a time that required him to be a WO2 and when he relinquished the post he was required to revert to his substansive rank ie Sgt. The rank engraved on the BWM and VM was the highest rank, whether temporary, acting or substansive, held in a theatre of war before 11.11.1918.
You will have noticed that the medal roll states that he was disembodied on 15.07.1919, which is not quite the same as discharged. It is a term used only for Territorial Force soldiers when they were stood down from full time service. They were governed by the TF regulations and had to be embodied on mobilization to enable the Army to have legal authority over them. Disembodiment may have included discharge but a soldier may have continued to serve further. It was possible for a soldier to serve up to age 55.
There is an interesting article on the Territorial and Reserve Forces Act 1907 here
https://en.m.wikipedia.org/wiki/Territorial_and_Reserve_Forces_Act_1907Charlie