I was hoping that someone might be able to give me some assistance regarding a minor mystery concerning my grandfathers WWI service; unfortunately he told me little about his service but I managed to glean the following. My grandfather enlisted in 4th LNL, probably 1916, at some stage he was wounded in the left arm, a flesh wound which he talked about almost fondly as it got him out of the line for a while, a subsequently was mustard gassed, although he lived to his early 70's he suffered with chest complaints all his life and this is what finally killed him, but I believe returned to service following this. His medals are marked 4 LNL but the badges I have for him are KSLI, I always presumed he was re-badged at some stage perhaps after returning to service following his wound, however the mystery- I have 2 sets of ID tags for him, one set is marked 41534 Jackson R 4LNL OK so far, but the other set is marked 619706 Jackson J POW, he was Richard John Jackson and his medals are R.J.Jackson with the former number, so the initials are OK. So does anyone have any idea as to the significance of the second set of tags, surely even if he was a POW he would not have had British tags proclaiming the fact. The only clue I have is that I recall him telling me that he guarded POW's in WWII could I have "misremembered" and he was actually assigned to this duty in WWI, but again, even if this was the case surely his tags would have his regiment as opposed to assignment. And last, but certainly not least, why 2 different numbers.