Now that Britain has left the European Union, the French president, Emmanuel Macron, has moved swiftly to put French nuclear weapons front and centre of EU defence policies. In an hour-long speech on Friday to L’École de guerre (School of War) in Paris, the French president called for a European dialogue about defence and deterrence based on France’s force de frappe of nuclear weapons launched by air and submarine, and invited other EU states to participate in exercises by his country’s nuclear forces.

This is the post-Brexit revival of a vision held by successive French leaders, who itched to establish EU defence policies that would rely on European nuclear weapons rather than the US and Nato. For decades, this aim was marginalised by other EU members. Brexit, Donald Trump and Vladimir Putin have emboldened Macron to put it back on the table – and this time he is getting more attention.