their diesel engines running as snow steadily falls. The train is not going anywhere but it is providing a vital service for dozens of people who have been left without power and basics like running water or heating. These are Ukraine's "Invincibility Trains", designed to boost public morale and provide some comfort as a bitter winter coincides with intensifying Russian attacks.

In one of the carriages, Alina sits watching her infant son Taras playing with toys provided by international charities who help run the service. "It's winter and it's rather cold outside," says Alina which is something of an understatement. With the effect of the wind-chill, temperatures this week in Kyiv have hit -19C. It is bitterly cold. "I live in a new building on the 17th floor, but we have no elevator, no electricity and no water supply," says Alina. As Taras plays with his toys, she says it is also a relatively safe and comfortable place for her daughter to meet friends. It is also a welcome distraction for Alina, whose husband works all day in a factory, but she suddenly starts to stutter and weep as she tells me about her 54-year-old father who was killed at the front two years ago in a summer offensive near Bakhmut. As she regathers her composure, Alina says she will definitely come back here and welcomes the relief the train brings from the weather and the nightly Russian strikes. (BBC