Endemol Shine Group has called in the banks to explore a sale – two months after Deadline revealed that the Big Brother superindie was set to be put on the block. The company, which produces series including Black Mirror, The Biggest Loser, Peaky Blinders and Broadchurch, has hired Deutsche Bank and Liontree, according to CNBC, to explore its options. It is thought that 21st Century Fox and Apollo Global Management, which currently own 50% each, have both agreed to sell…