Cameron and his chancellor George Osborne are convinced the way to win is by highlighting the economic cost of leaving the EU. But their first intervention falls flat, as Vote Leave sends their new messenger Boris Johnson around the country on a bus that claims Britain sends the EU £350 million a week.
Meanwhile, Nigel Farage is running a separate leave campaign focused on immigration. Despite refusing to confront immigration head on, Cameron chooses to share a platform with Nigel Farage.
