Nigella Lawson has been named as a new judge of The Great British Bake Off. News of her addition comes as longtime judge, Pure Leith, has announced her exit from the reality competition series. “The Great British Bake Off is more than a television programme, it’s a national treasure – and it’s a huge honour to be entrusted with it. Originally, The Great British Bake Off was on BBC before moving to Channel 4 in the UK. Speaking to The Spectator, she said, “I have been dithering for years about when to stop judging The Great British Bake Off.