George Katz, 86, outside his family jewellers in Hatton Garden (Image: Jonathan Buckmaster)A historic Hatton Garden jewellers is threatened with demolition so developers can open a heist-themed bar in the basement. Family firm E Katz & Co Ltd stands on the same block where an ageing gang stole £14million from safety deposit boxes in 2015.The shop was founded by Emil Katz in 1946, seven years after he fled Nazi-occupied Czechoslovakia with a handful of diamonds sewn into his suit. Emil's son George, 86, who joined his widowed mum Edith in the firm 70 years ago, said of the plans: "It's...