David Cameron's top advisers - including George Osborne and William Hague - reveal the discussions that led to the decision to hold an in/out referendum. The programme lifts the lid on the prime minister's attempts to get a new deal for Britain in Europe. Top leaders, including presidents Tusk, Juncker, Sarkozy and Hollande, reveal the details of their negotiations with Cameron. From Prague to Chequers, the prime minister tries to convince his partners to give him something to show Britain can claw back power from Brussels, especially on immigration, but he keeps getting knocked back.