How did Heathrow used to look ?

[beamender99]

Duckbutt

Thanks for your expert description. Your [pedant] was well justified.
I knew they were something special hence they are protected but I had no idea of the technical name.

( About ten years ago BA had to get English Heritage clearance before A/C could be installed A/C = Air Conditioning in the offices)
This presented big problems because the detailed building plans had been lost.

Looking again at the photo.
Behind the A/C tail appears to be TBC ( Technical Block C) under construction but still there with Speedbird House on the left.

So this view of the hangar still exists today but with the new road from Hatton Cross to North side passing in front of it.