can l just say that this is the place to start with any RAF research, the best site on the net.
While I yield to no-one in my admiration for, and dedication to, Rootschat and for those who contribute, I would observe that I, in common with many others I suspect, also use two web sites dedicated purely to RAF research and at least one other dedicated purely to WW2 to support our my/our research.
The abbreviation W/Op (Air) is clear enough and the abbreviation W/Op (Air Gunner) or (AG) is to be found. The additional LEA is not to be found (or any variant although I believe it to be as written) in the comprehensive listings of RAF trade groups 1938 to 1944, in RAF glossaries or in lists of abbreviations.
A query asking for help on this has, so far, received no definitive response here and has, so far, defeated experts on a dedicated RAF members site. The abbreviation receives no relevant hits on any sensible RAF related search.
The above by way of a (lack of) progress report. I remain optimistic.
MaxD