May 'does not have united cabinet on Brexit'
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Alastair Campbell on UK politics, Article 50 and Brexit

Tony Blair's former spin doctor says he is in a minority in thinking Brexit can be stopped, but that the majority of people think it should be stopped.

Now the editor-at-large for the New European, Alastair Campbell looks at UK politics in the wake of triggering Article 50 in a personal film for This Week.

He says: "I don't know what the mechanism is going to be, but I believe it can happen, I believe it will happen, and I believe it must happen."

Go to next video: Davidson v Nuttall on UKIP's future