Ukrainian first lady Olena Zelenska tells the BBC that Ukraine will endure this coming winter despite the cold and the blackouts caused by Russian missiles, and will keep fighting what she describes as a war of world views, because "without victory there can be no peace".

We meet in a storied city where a winter's chill is biting, where charming street lamps are dimmed, where buildings are going dark and cold in the midst of blackouts as Russia keeps striking Ukraine's energy grid.