The UK and Germany have agreed a friendship treaty aimed at resetting the countries' post-Brexit relations. The treaty comes nearly a decade after Britain's vote to leave the European Union.

Friedrich Merz’s visit to the UK only a week after that of Emmanuel Macron symbolizes a return of the E3 format – France, Germany and the UK – as the driving force of European security.

Friedrich Merz’s first London visit as chancellor after French President Macron signals greater cooperation between Europe's top three powers amid uncertainty about their US ally.