A young couple enjoy the view across London from Primrose Hill, a vantage point north of the city. A fine summer’s day was gradually turning into evening.

It was an irresistible capture, despite my reluctance to take candid shots. They seem as one, and as if nobody else was around. But the hill was humming with people, relaxing and enjoying an escape close to the capital.

The full story of seeing day turn to evening from high above London will be told soon.