ChrisVJ - not such a sproglet.
First Heathrow flight was also first flight in 1949. Like you, Rapide of Island Air services (it says on my photo). I believe the 'lady pilot' went on, at a much later stage in her career, to run the simulator in the hotel at Victoria station.
Ten bob joy-ride from the viewing area, off the Bath Road. (Deckchairs for the spectators and a chestnut paling fence to keep you off the taxiway.)
I remember the airliners were nearly all polished ali, and flew their ensigns from the flightdeck (probably cockpit back then) roof.
And by and by, a cloud took all away (as Roger Bacon might have put it)