Heavy steel doors at Holborn
At the bottom of the Piccadilly Line escalators at Holborn, you turn
right to reach the platforms. As you enter the tunnel at the bottom of
the escalator, there is a large, heavy-looking, apparently steel door
set into the wall on the left-hand side of the foot tunnel.
Other than having been painted open, it looks like it is in working
order (it even has a small handle).
What was the purpose of this door, and is it still available for that
use today?
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