Jonathan Hart, the managing director of Caffe Nero, has been appointed as the new chief executive of Thorntons, the high street chocolatier. Hart, who joins Thorntons on January 4, has spent the last five years at coffee shop chain Caffè Nero. Before this he held senior positions at Abbey, Woolworths, Big W and ITM Communications. He replaces Mike Davies who quit the confectioner in May after continued tough trading conditions prompted another profit warning.