Can we please, please separate the issue of whether this is an indecent photograph of a child, from the issue of whether it should be censored on the internet?
I think that the photo indecently depicts a naked, underaged girl in a sexually provocative position. And, while I wouldn't classify it as pornographic myself, I am not surprised in the least that some people think it is child porn. I don't think that the photograph should have been taken, and I think the band and record label should have thought more carefully about putting it on their front cover.
However, I do NOT support the UK Government and ISPs from censoring the wikipedia article, or any other replications of the image on e.g. Amazon or Play.com. I support censoring genuine child pornography websites, and arresting those involved. But Wikipedia is clearly not a child porn website, and the image is provided for genuine educational purposes.
So lets focus on one thing at a time, eh?