I have never used the newspaper archives so need a little help, advice.
My brother-in-law recently told me that his mother showed him an obituary in the Daily Telegraph of a man who had died. The photo referred to him as a Flight Lieutenant

(no name remembered) who had just died and I assume he was of some importance. The photo of him in The Daily Telegraph showed the deceased and standing next to him was my father-in-law as a very young man. The photo was taken in Tenby and probably late 1942 onwards. The Flight Lieutenant was said to be a Seaplane Pilot, my father-in-law was in the RAF Marine Division in Tenby in his earliest service days. My brother-in-law thinks the newspaper article his mother showed him would have been shortly before her death but possibly in a window of September 2007 - October 2010. It would be lovely to find the article and the photo of my father-in-law as a very young man.
How would I search for this and any clues as to success to find it?