In this book, the themes of my earlier book, Should Britain Leave the EU? (Minford et al., 2015), are pulled together to discuss how we should follow up with post-Brexit policies, now that Brexit has finally taken place. ‘What should Britain do, having left the EU?’ This is what this book aims to answer. As before, I will rely heavily on research that my co-authors and I have done, mostly now in Cardiff over the last 20 years, building on earlier work in Liverpool over the previous 20.