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Britain is supplying Ukraine with short-range anti-tank missiles for self-defence after Russia amassed about 100,000 troops on its border, the defence secretary said.

Ben Wallace told MPs a small team of British troops would also be sent to Ukraine to provide training.

He said there was "legitimate and real cause for concern" the Russian troops could be used for an invasion.

Russia denies any invasion plans and accuses the West of aggression.

Newsnight’s diplomatic editor Mark Urban reports and Faisal Islam is joined by Ukraine's ambasador to the UK Vadym Prystaiko.