Extreme seasons at 51.5° North
London stretches from about 7 hours 50 minutes of daylight at the winter solstice to 16 hours 39 minutes at the summer solstice — a swing of nearly nine hours. In late June the sun sets after 21:20 BST; in mid-December it is dark before 16:00 GMT.
Golden hour, the London way
London's high latitude is a photographer's gift: summer golden hours run well over an hour, and around the solstice the evening window blends into a soft blue hour past 22:00. Winter compresses the whole day into a short arc, but low sun angles last all day in December — flattering light from morning to afternoon.