Sir David Attenborough has today warned we must make 'life or death decisions' to tackle climate change. Over recent years the naturalist and broadcaster has been demanding politicians and the public take urgent action on our environment.

One 91-year-old climate activist from Sussex has been doing exactly that for much of his life. John Lynes has been arrested at least 25 times - fighting for change.

The UK's oldest protester said he agreed with Sir David today, that the 'moment of crisis has come'.

Andy Dickenson went to meet him. Video of John protesting in Hastings, Dover and London courtesy of Lisa Clifford