Christine Blower, general secretary of the National Union of Teachers (NUT), has accused Ofqual of "shifting blame" in a report which suggests pupils have been let down by the exams system.
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Singer posted on Facebook that she had taken an overdose and hidden in a hotel.
After decades of struggling negotiations both activists and delegates are hoping for some form of landmark agreement.
World Rugby chairman Bernard Lapasset led the tributes, calling Lomu 'a giant' of the game.