Morning.
Unfortunately despite their fancy name, the LIR weren't really considered anything special by WW1/WW2 (They were of course, as were ALL our fighting men and women) so unless photos were annotated by the person who took them (and in the case of Army photographers, they were) then there will be no record of who they were or what the were doing at the time...
It's an unfortunate fact that there were that many people fighting and dying, nobody thought the average Tommy was a special case... It's an even more unfortunate fact that many didn't want to or were unable to talk about it. It's just not when men of the time did.