UK russia
The Russian president's fury was apparently aimed at the country's deputy PM.
A lack of trained personnel and resources is to blame.
"I fear we could be having this conversation at the two-year anniversary and potentially the three-year anniversary."
It warned that if Ukraine received fighter jets, the "consequences" for the whole world will be "on the United Kingdom's hands".
The Ukrainian president thanked the UK for its "grit" and joked that he was "thanking all of you in advance for powerful English planes”.
Vladimir Putin's troops are only gaining a few hundred metres of territory a week.
Frederik Pleitgen, who was reporting in Kramatorsk during the attack, said Russia's war in Ukraine is one of "the most dangerous" he's ever covered.
It comes as Moscows is expected to launch a new offensive to mark one-year since it first invaded Ukraine.
Moscow was expected to start ramping up its attacks on the one-year anniversary of the Russian invasion.
"That's what we are doing," the PM's spokesman said.