If the political decision is difficult, what will the practical delivery be like? How can it be done? By whom? And when? Maddox is the Director of the Institute for Government; Lord Burns was Permanent Secretary to the Treasury in the 1990s; Pryce was joint head of the Government’s Economic Service until 2010, and is the author of Greekonomics; Allen Green writes the Jack of Kent blog and is the author of Brexit: What Everyone Needs to Know.