Radiohead frontman Thom Yorke has slammed British Prime Minister Tony Blair for his lack of integrity, and refuses to meet him to discuss his climate change campaign. The crusading rocker, an ambassador for environmental group Friends of the Earth, feels let down by his leader's lack of "environmental credentials" and believes any talks to cut greenhouse gas emissions would be futile. Despite being asked by a pressure group to discuss the issue face-to-face, the Karma Police hitmaker remains reluctant. He says, "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. "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." And the singer admits the situation grew so unpleasant he was in danger of falling sick with worry: "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."