The 29-year-old man had to be rescued by the local lifeboat off Trevaunance Cove, St Agnes.

A member of the public also leapt into the water to try to help him. Coastguards say they believe the man had been "tombstoning".

Coastguards have warned once again about the dangers of jumping into water from a height.

James Instance, Falmouth coastguard watch manager said: "This is the second incidence of people jumping off cliffs into water - sometimes known as tombstoning - which coastguards in the South West have dealt with overnight.

"In the first incident a man lost his life. This incident could just as easily have resulted in a fatality. This man lost consciousness as he hit the water and became severely hypothermic."