Early in 2025, Prime Minister Sir Keir Starmer has been invited to an informal summit of EU leaders. It’s the first such invitation for the UK since the bitter days of the Brexit negotiations.

The focus of the February meeting is future security and defence co-operation. The backdrop: the volatile state of the world from Europe’s perspective.

Wars rage in the Middle East and in Europe – with Russia aided in its assault on Ukraine by Iran, North Korea and China.

Adding to the uncertainty haunting this continent, Donald Trump is poised to re-enter the White House.

He threatens Western cohesion with his pledge to slap punitive tariffs on imports – a big worry to the EU and the UK – and to potentially walk away from Nato, the transatlantic defence alliance Europeans have relied on for security, since its founding after World War Two.