Sir Keir Starmer and Olaf Scholz have said the UK and Germany's support for Ukraine remains "unyielding".
Speaking at a joint news conference in Berlin, the prime minister said Ukraine was not just fighting to defend itself from Russian aggression but also "for all the people across Europe".
Mr Scholz, the German chancellor, said both countries would continue to lend "financial, economic, political and military support" for "as long as this is necessary".