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What's OnGBBO: Twitter aghast at Prue Leith announcing the winnerGreat British Bake Off judge Prue Leith accidentally tweeted the winner of the Channel 4 series before the show aired.By The NewsroomPublished 31st Oct 2017, 15:02 BSTUpdated 12th Dec 2017, 13:12 BST Prue Leith, who has appeared to accidentally reveal the winner of this year's Great British Bake Off.PA VideoRelated topics:Prue LeithTwitterChannel 4