In the freezing, muddy trenches of the Ukrainian front lines - the scenes are reminiscent of the first world war.<br /><br />A bitter fight between Russia and Ukraine for every inch of territory - with troops under almost constant fire.<br /><br />The Russians remain in control of the city of Donetsk in the illegally annexed Donbas region of eastern Ukraine.<br /><br />But fighting continues to the west of the city as Ukrainian forces defend positions to prevent Russian advances.<br /><br />Our international editor Lindsey Hilsum travelled to the Ukranian forward positions to the east of the strategic town of Krasnohorivka just a few kilometres west of Donetsk and spent the day with the 79th Air Assault brigade, who are digging in for a long, cold winter<br /><br /><br />She joins us now from the city of Kramatorsk, which has been hit repeatedly by Russian missiles in recent days.<br />
