The blue flame suddenly roars to life, it rumbles deep in the belly of the dark basement below. Cold rusty pipes begin to warm as fire boils dirty brown water inside heavy iron coils. The radiator hisses and drools as hot steam begins its long journey through the highway of conduits that lead to silver valves above. They come alive and breathe a heavy breath, and like warriors they stand guard in the corners of your house. Then it starts again, the tapping of the pipes by the demons in the basement. With iron mallets they smash at the hot iron pipes, daring you to meet them in the dark caverns below. The cold air of your room begins to fade, replaced by a warm vapor of steam. The softness of your pillow, the comfort of your home, you close your eyes and fall asleep. Sweet dreams to you, oh Kensington homeowner, and try not to have nightmares about your next National Grid bill.