Ever noticed the door? The boring white door at the entrance to the Northbound Piccadilly Line platform at Holborn?

You’ve probably walked past it a number of times not knowing what’s behind it.

A whole other world of Leslie Green tiles and long forgotten posters. Of rusty track and dusty walls. A world of abandoned platforms and the Aldwych branch is behind this door. Let me in.

Image copyright A Carter – CallingAllStations.co.uk