With a war in Ukraine and the U.S. rethinking alliances, Britain and the European Union may need each other more than they thought. Here's what happened at Monday's summit — and what didn't.

Britain and the European Union have agreed to a landmark deal aimed at “resetting” their post-Brexit relationship, easing restrictions on travel and work for hundreds of millions of people on the continent.

Britain and the European Union have hailed a new chapter in their relationship. They have signed fresh agreements on defense cooperation and easing trade flows at their first formal summit since Brexit.