Britain plans to reopen its embassy in the Ukrainian capital of Kyiv next week and is looking at reinforcing allies who sent armaments to Ukraine, Prime Minister Boris Johnson said on Friday.

The British government announced in February, days before Russia invaded Ukraine, that its embassy in Kyiv was relocating temporarily and staff were operating from a diplomatic office in the city of Lviv.

“The extraordinary fortitude and the success of (Ukrainian)President Zelenskiy and the Ukrainian people in resisting Russian forces in Kyiv, means that I can announce today that we will shortly – next week – re-open our embassy in Ukraine’s capital city,” Johnson told a news conference.

The British leader said Russian President Vladimir Putin had made a “catastrophic blunder” over the invasion, but that it remained a realistic possibility Russia could still win in Ukraine.