Swiss police have said the fatal wingdiving accident occurred among a group who were in the region as guests of a company that makes extreme sport films for the internet.
Although police have yet to confirm the victim's identity, he is understood to be Olympic stuntman Mark Sutton.
Police, though, said: "The victim, a Briton, was 42 years old. He was staying in Chamonix (in France) with 20 followers, considered among the best in the world in this discipline."
More top news
Prosecutors will seek the death penalty for a man accused of shooting dead nine people at a church in South Carolina.
Plenty of dry weather around, although the odd spot of rain for a few. Not as cold overnight as it has been.
A young boy who got his head stuck in a child's toilet seat had to be cut free by firefighters.