As troops grapple with freezing temperatures and missiles cause mass power cuts across Ukraine, the BBC’s Security Correspondent Frank Gardner assesses both sides’ military strategies.

Victoria and Vitaly speak to Yaryna Chornohuz, a mother who is now a soldier on the front line. She has a young daughter, but says she feels compelled to fight.

And Father Vitaliy Novak describes how he and a team of volunteers are delivering food to people across the country, some of whom are living in church basements.

Today’s episode is presented by Victoria Derbyshire and the Russia Editor for BBC Monitoring, Vitaly Shevchenko.