Britain's King Charles III met Ukrainian President Volodymyr Zelenskyy at Windsor Castle on Friday ahead of talks with two dozen European leaders who have pledged military help to protect Ukraine from future Russian aggression.

The meeting hosted by British Prime Minister Keir Starmer is also due to discuss ways of helping protect Ukraine’s power grid from Russia’s almost daily drone and missiles attacks as winter approaches, enhancing Ukrainian air defenses, and supplying Kyiv with longer-range missiles that can strike deep inside Russia.

The talks aim to step up pressure on Russian President Vladimir Putin, adding momentum to measures in recent days that have included a new round of sanctions from the United States and European countries that take aim at Russia’s vital oil and gas export earnings.