Photo by Nick Catford -  Subterranea Britannica 

On a staircase are a series of  five matchstick men cartoons drawn sometime during 1944. At the bottom of the stairs - step 168 - the matchstick figure is strong and upright. As you progress up the stairs the figure gradually becomes more bent until at step 20 it's leaning over and sweating. Tucked in the gaps of the tunnel lining of the staircase you can often find a Cigarette packet where some poor soul has stopped for a rest and a smoke on the way up. Lifts were never fitted.

 The B5 on the floor is an navigation aid: west/east crosscut 'B', north/south lateral '5'. 

Photo: Jan West