Why does Zack Polanski think Labour will move his way?

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Why does Zack Polanski think Labour will move his way? What does Rhun ap Iorwerth want from Andy Burnham? Who cracked the politics of Castles? Who will be the MMP for Sutton Coldfield? Matt Chorley brings you the who, what, where, why and when of British politics. If you've got urgent questions... then email Chorley@bbc.co.uk