Originally Posted by
Kiwithrottlejockey
I would say your photo was taken about 20 seconds earlier than the one posted previously. It's just passing overhead Greenwich eastbound, Deptford with it's onetime riverside industry beneath, and the tip of the Isle of Dogs visible just ahead of the aircraft nose on the right.
The previous phote here has it passing over, among other things, the Charlton riverside plant of J Stone, while the one here now has it passing over their Deptford main plant, the two factories having been either side of Greenwich town centre. J Stone produced all sorts of industrial items, air conditioning plant, escalators, and aircraft components - including, according to their Wikipedia page, for the Comet. I wonder if they were on some sort of publicity photoshoot for the company. If so, they just got lucky with the cloud breaks.
Stone Foundries still operates at Charlton in a plant established in 1939 to produce aluminium and magnesium light alloy castings mainly for the aircraft industry,
[1] having produced specialised alloy parts and aircraft propellers for the
Vickers Viscount and
de Havilland Comet.
[
https://en.wikipedia.org/wiki/J._Stone_%26_Co
.