UK Prime Minister Keir Starmer has announced a four-point plan to work with Ukraine to end the war and defend the country from Russia.

Axar.az reports citing BBC, the UK, France and other countries will step up their efforts in a "coalition of the willing" and seek to involve the US in their support for Ukraine, he said on Sunday - after calling a summit of 18 leaders - mostly from Europe and including Volodymyr Zelensky - three days earlier.

"We are at a crossroads in history today," Starmer said after the summit while Zelensky said Kyiv felt "strong support" and the gathering showed "European unity at an extremely high level not seen for a long time".

Speaking at a news conference shortly after the meeting of leaders, Starmer said four points had been agreed:

- to keep military aid flowing into Ukraine, and to keep increasing the economic pressure on Russia

- that any lasting peace must ensure Ukraine's sovereignty and security and Ukraine must be present at any peace talks

- in the event of a peace deal, to boost Ukraine's defensive capabilities to deter any future invasion

- to develop a "coalition of the willing" to defend a deal in Ukraine and to guarantee peace afterwards

The prime minister did not state which countries had agreed to join this coalition of the willing, but said that those who had committed would intensify planning with real urgency.

The UK, he said, would back its commitment with "boots on the ground, and planes in the air".