I was flying over central London on a bitterly cold day in December. Despite my gloves, my hands were almost too chilled to operate the camera, and my face was numb from the rotor blades’ downdraft. It was close to the shortest day of the year and, even though the sun was at its highest point, the light was coming almost horizontally, illuminating the building tops but leaving the lower levels plunged in darkness. The helicopter passed over the Royal London Hospital and the sight of this isolated patch of light and colour surging out of the monochrome gloom of winter was irresistible.
Joseph Ford is a photographer living in Brighton