Pass a binding law that compels all future trade deals with trading partners to include the free movement of people - the freedom to live, work, and travel in either territory with no more restrictions than we have within the UK as UK citizens.
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With the right of UK citizens to live, work, and travel visa-free and unhindered in the EU to disappear as the UK leaves the bloc, we must write into law that any future free trade deals signed with any countries will include free movement of people to complement free movement of goods, services and capital.
If money and trade can cross borders, so should people, else global inequality may increase, and the common heritage of this planet's surface continue to be denied to its inhabitants.