Greenwich Cyclist at Night

I just learned that a friend was injured on his motorbike while commuting in the thick of London traffic. Ee gads! The news sent me perusing our London photos, shot during our January travels there. One evening we all walked up a long hill in Greenwich to its famous observatory. It was very dark, yet cyclists persisted to pedal up the winding, misty road that leads to the prime meridian. Here are their wheels in motion, visible in a long exposure...