Sounds cool. A new sport I didn't know was brewing. This follows the
exposure in the movie "Tomb Raider: the cradle of life" released last week,
in which the two stars glide across a harbor after base-jumping from a high
rise. Beating a world record in the process, so they claimed.

I wonder if this is the first glider flight across the
channel? If so, shouldn't we cheer

The first such, I believe, was by Robert Kronfeld in the "Wien" ca 1929, in
which he made the crossing (both ways, I think) after being aerotowed as
high as necessary over the departure shore (a feat in itself given how rare
aerotowing was at the time). Not nearly so high as this guy, as the
"Vienna" with its 18 or 19m wingspan and decent streamlining despite struts
had a glide ratio pushing 30. His stunt was sponsored by the Daily Mail
newspaper.