"This is not a bluff." Vladimir Putin orders Russia’s first military mobilisation since World War Two and says Russia, which is one of the largest nuclear powers, would use "all the means at [its] disposal" if its territory were threatened. | Channel 4 News

Russian troops have withdrawn from the Ukrainian city of Lyman after Ukrainian forces got close to encircling them. Lyman's recapture is one of Russia's worst military defeats since the start of its invasion in February. Emily Wither reports. | Channel 4 News