Ed Miliband has told ITV News that he has apologised to Swindon Labour leader Jim Grant whose name he didn't recognise in a toe-curling radio interview yesterday.
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The 10-year-old suffered numerous seizures and reportedly began sweating and frothing at the mouth as his eyes dilated.
Part of what has gone wrong is that many voters do not see Jeremy Corbyn as a credible prime minister.
The rapper joins previously announced headliners Kasabian and Muse at the top of the bill.