Thom Yorke has lashed out at Tony Blair, saying he has "no environmental credentials."

The Radiohead lead singer, who works for Friends of the Earth as an ambassador, was asked to meet with the Prime Minister on their behalf to discuss environmental issues. However, Yorke did not end up meeting with Blair after making himself ill through stress.

He explained: "Luckily, in the end the decision was kind of made for me. There's this whole thing going on at the moment with Blair and the nuclear thing. This all started kicking off about two or three weeks before I was supposed to meet with Blair, which I was not happy about anyway for obvious reasons, ie Iraq.

"It was, 'If we could just have a meeting beforehand where we could go through how it would proceed ...'. It was like talking to Blair's spin doctors. It was all getting weird. It was just obvious there was no point in meeting him anyway, and I didn't want to.

"That was the illest I'd ever got. I got so stressed out and so freaked out about it. Initially when it came up I tried to be pragmatic. But Blair has no environmental credentials as far as I'm concerned.

"I came out of that whole period just thinking, I don't want to get involved directly, it's poison. I'll just shout my mouth off from the sidelines. It's a nasty business. It's up to people with pure integrity who know what they're talking about, like Friends of the Earth."