Follow the data: does a legal document link Brexit campaigns to US billionaire?

We reveal how a confidential legal agreement is at the heart of a web connecting Robert Mercer to Britain’s EU referendumOn 18 November 2015, the British press gathered in a hall in Westminster to witness the official launch of Leave.EU. Nigel Farage, the campaign’s figurehead, was banished to the back of the room and instead an American political strategist, Gerry Gunster, took centre stage and explained its strategy. “The one thing that I know is data,” he said. “