I think that's the citation for his MBE. Just in case you are confusing his time in Malta with his later postwar posting to HQ Anti-Aircraft Command, the latter was located at Stanmore and that is where he was Camp Commandant. HQ AA Command was based in a large house named Glenthorn located in the grounds of Bentley Priory, just to the North of Stanmore town.
RAF Bentley Priory was the HQ of the RAF's Fighter Command which was responsible for the air defence of the UK, and Glenthorn house was about 300 yards to the West of the Priory, because there obviously needed to be close co-ordination between the Army's Air Defence guns and the RAF. You can see the location of Glenthorn and Bentley Priory on this map from the 1940s:
https://maps.nls.uk/geo/explore/#zoom=17.2&lat=51.62620&lon=-0.33777&layers=170&b=1&marker=51.62669,-0.334175 About half a mile in the opposite direction was the HQ of the
RAF's Balloon Command, responsible for the barrage balloons which were deployed to interfere with enemy bombers.
A little bit about the role of HQ AA Command here:
https://www.britishmilitaryhistory.co.uk/wp-content/uploads/sites/124/2019/04/Anti-Aircraft-Corps-History-Personnel.pdfand the composition of the Headquarters in 1939:
http://www.niehorster.org/017_britain/39_commands/aa_command__staff.htmThe duties of the Camp Commandant were to act as the quartermaster for the Army accommodation along with overseeing such things as the catering, guards, transport and general amenities. He would have had to liaise closely with his RAF opposite number as many facilities would probably have been shared as they were on the same site.
As for the Gazette entry for his MBE, you can find it here:
https://www.thegazette.co.uk/London/issue/39863/supplement/2951. You will need to go back 3 pages (to page 2948) to see the wording at the start of the entry, namely "To be Additional Officers of the Military Division of the said Most Excellent Order [of the British Empire]"