Originally Posted by
NoTiersForMe
How did this nugget escape me?
I'm afraid I can only prescribe a course of further Flyertalk. Here is another thread, and my reckoning on how the date was established. I can only agree with
mikeyfly that it is a bit tenuous, however at least the inaugural flight did take off not too far from 27L.
Time for a BA flypast?
https://www.britishairways.com/en-gb/information/about-ba/history-and-heritage/explore-our-past/1910-1919
(I'm not sure what we were doing sending grouse to Paris, but that's another matter).