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.

The government of British Prime Minister Keir Starmer, who met with European Commission President Ursula von der Leyen and other senior EU officials, billed the summit as a major milestone in resetting relations with the 27-nation trade bloc.

LONDON—The United Kingdom and the European Union are expected to seal new deals on fishing rights and defense as officials meet in London on Monday to discuss closer ties in their first official summit since Brexit.