I can't quite help on that but I do have a memorable experience of
Langar. At one time, it was operated, at least in part, by the Royal
Canadian Air Force.

I was invited the Officers' Mess one evening while a student at
Nottingham University for a Bridge Match; I was in the University
bridge team. In a very short apace of time, the Officers and their
"ladies" became significantly "under the weather" due to
excessive consumption of (doubtless duty free) alcohol. My bridge
partner and I managed to be a little more restrained with our
consumption, but we certainly took full advantage of the Canadians. I
can't recall the exact details nearly 50 years later, but we were
making the most outrageous bids - and coming home with slams when we
probably should never have bid that hand at all. We absolutely
slaughtered them!

Sorry Philip, but I didn't think to ask for the WMO station number!

Jack