Britain’s new prime minister, Andy Burnham, will welcome Ukrainian President Volodymyr Zelensky as his first international visitor on Monday, in a move that underscores London’s steadfast support for Ukraine, Burnham’s office said.

Axar.az reports, citing Reuters, the two leaders are expected to meet at a naval base, where they will hear how UK-led training programs are helping strengthen Ukraine’s armed forces and deliver results on the battlefield, according to Downing Street.

“Britain stands with Ukraine, shoulder to shoulder, and our support remains unwavering,” Burnham said in a statement. “Russia should be in no doubt of our resolve, and we will not back down until we achieve long-lasting and just peace for Ukraine.”

During the visit, Burnham and Zelensky will meet more than 200 Ukrainian military personnel and sailors who have spent the past three weeks in Britain taking part in Exercise Sea Breeze, a maritime security and counter-mine exercise designed to prepare participants for future missions in the Black Sea.