The UK has trained more than 450 Ukrainian soldiers over the past few weeks, so they can operate weapons being sent by the British government.
From 2015 until the invasion in February, British troops trained more than 22,000 members of the Ukrainian Armed Forces as part of Operation Orbital.
On 17 June, Prime Minister Boris Johnson announced plans for a new UK-led training scheme, which could train 10,000 soldiers every 120 days.
