Early in 2025, Prime Minister Sir Keir Starmer has been invited to an informal summit of EU leaders to discuss future security and defence co-operation. The focus of the meeting is the volatile state of the world from Europe's perspective, with wars raging in the Middle East and Europe, and the potential re-entry of Donald Trump into the White House. Trump's threats to impose punitive tariffs on imports and potentially walk away from NATO are major concerns for the EU and the UK.