Thank you all for your replies. Will try Kew (never thought of there. senior moment!!)
The new building still does the same work as always providing cheap clean accomodation for servicemen & their families when in London.
I remember the old building which was lovely, but had limited accomodation (I grew up not far from there) & the new
building looks rather like a tall office block.
UPDATE: Have looked at the records kept at Kew online and they all appear to be about many of the clubs overseas, with the exception of a group of photographs taken by Harry Lloyd (?) in the 1920's. My thought horrifying as it may seem is that when the old building was demolished in the 1970's that all the old records, fixtures & fittings etc., were just thrown out.