After 26 days of war, there are some changes in the peace negotiations, Ukrainian negotiator Mykhaylo Podolyak tells the BBC.
Ukraine's resilient performance has forced Russia "to more adequately assess the reality" of the situation, as he puts it, which has helped in encouraging "some sort of a dialogue".
But any decision on a peace agreement will be made between Ukrainian President Volodymyr Zelensky and Russian leader Vladimir Putin.
Podolyak says there is no agreed date when their meeting might happen.
Although he refuses to give details of the negotiations, Podolyak makes it clear Kyiv is not going to make any compromise on territorial integrity or Ukraine's sovereignty.
He once again expresses Kyiv's frustration about Nato's refusal to impose a no-fly zone in Ukraine.
"[They] are not closing our sky, [they] are standing aside at the time when 10 million people are in search of places to live and three million have already left the country. This is a humanitarian catastrophe in Europe."
