Russians ban traditional Ukrainian Christmas celebrations in occupied territories / Ukrainian soldiers mark Christmas on frontline of war / Russian troops close in on Ukrainian city where classic Christmas carol was born / The famous Christmas carol inspiring Ukraine's defenders / Ukrainian family separated by war reunited for heartfelt Christmas message live on Sky News / Brave British dad risking his life to spend Christmas Day on Ukraine frontline / Hope for Ukraine is gathering thousands of gifts to send to Ukrainian children / 'The most vulnerable'. As the war rages on, Ukrainian volunteers bring holiday gifts to children living on the front lines / 'Reindeer' volunteers bring holiday magic to Ukrainian children living on the frontlines