Dive summary:

• In a scene reminiscent of a crane damaged by super-storm Sandy in New York, a construction crane at a high-rise residential project in London dangled over city streets after a helicopter hit it.
• The highly experienced pilot of the chopper and one person on the ground died in the accident in the Vauxhall district south of the River Thames.
• The 50-story Tower is a round structure being built on a wharf on the river's shore by St George PLC.

From the article:

The Agusta 109 helicopter, with only the pilot on board, had been flying toward Elstree, the location of several film studios north of London, but was diverted because of bad weather. ...