U.K. Prime Minister Keir Starmer signed a 100-year partnership agreement with Ukrainian President Volodymyr Zelenskyy on Thursday, part of a European show of support and promises to keep helping Ukraine endure in its nearly three-year war with Russia.

Struck by the “grim reminder” of war while visiting a burns hospital unit in Kyiv earlier today, the prime minister promised the UK would “play its full part” in guaranteeing Ukraine’s security. The Sheffield-made guns will be delivered to Ukraine’s military over the next few weeks as part of this deal, Sir Keir said.