Light-flooded halls on slender pillars striving towards the wide ceiling; the brick blocks of the boilers rise up between the walls like pylons. Holes yawn in the floor of the gutted naves, opening the way into the rusty darkness of the crypt. Shadows move across the walls with the clouds outside chasing across the sky. Windows and roofs creak in the wind. The cathedral of concrete and steel is breathing, pulsating - living.