Lahore aircraft park,1932

i have my Grandfather’s service record (Sqn Ldr A.H.Brinsley) and he was posted to Lahore aircraft park in mid 1932.any info and pics would be greatly appreciated as a google search doesn’t reveal a lot.

he was posted as a wop/ag to 28 Sqn in 1931,then onto 5 Sqn in 1932 before going back to 28 Sqn in 1936.he left India,for Calshot, after 7years and that was his first posting.

also on the service record there is a column marked ‘reason’,in between ‘unit to’ and ‘checked’.in this column are the letters H,G,F,BX,A and X. any ideas as to what these letters refer to.

cheers
karlio