The 80-yearold environmentalist and former broadcaster, admitted that his scepticism signalled the end of his career as he had known it.

“From that moment, I really wasn’t welcome at the BBC,” he said.

“They froze me out, because I don’t believe in global warming. My career dried up. I was thrown out of my own conservation groups and I got spat at in London.”

Mr Bellamy said things first began to change in 1996 when he spoke out against wind farms during one of his regular appearances on Blue Peter.

“That was the beginning really,” he told the Daily Mail. “From that moment, I was not welcome at the BBC.”