The choice we face is between greater security and global influence as part of the EU, or a period of prolonged uncertainty and permanent retrenchment by walking away. For the Leave campaign to assert that both everything will change, but nothing will change is not simply a contradiction. It fails our collective duty to serve the national interest. That is why the patriotic choice is for a Britain that continues to lead in the world by leading in Europe. To do otherwise would not only limit the opportunities of our children and grandchildren, but their ability to meet the challenges of tomorrow. So this is the moment to decide whether we want to be great or little Britain.