04:31
The UK defence secretary has once again ruled out a no-fly zone over Ukraine, saying it would be counter-productive.
However, he warned there was a risk Vladimir Putin would start to “ruthlessly pummel†cities from the air.
Ben Wallace rejected calls from Ukraine for a no-fly zone because it would “lead to a war against Russia across the whole of Europeâ€.
He also said it would stop Ukrainian pilots being able to target Russia from the air, giving an advantage to Moscow, which has stronger ground troops and tanks.
“If you had a no-fly zone in Ukraine, the overwhelming scale of the Russian army would be able to drive around with impunity, which it can’t at the moment,†the defence secretary told Sky News.
Wallace said a convoy of Russian tanks heading towards Kyiv was moving so slowly because of logistical problems and low morale.
Updated