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But like Charles Clarke, I am sceptical. Here's a bit of what I wrote in my weekend column in the Derby Evening Telegraph.
"Earlier this year, North Korea shocked world opinion by testing a nuclear weapon underground, and Iran is known to want to follow suit. What moral authority do we have in seeking to dissuade them from that potentially catastrophic course if we are planning to spend £20bn on ensuring we remain a member of the nuclear club?"
More of this in my Week in Politics Podcast, a text version of which is available HERE.