Ukrainian soldiers have been filmed alongside depleted uranium ammunition that Britain is supplying to their country for the fight against Russia.
The footage is contained in a documentary the UK Ministry of Defence (MoD) released Sunday as Ukrainian tank crews completed their training.
Britain is gifting 14 Challenger 2 tanks to Ukraine together with depleted uranium shells, which Declassified revealed last week.
An MoD spokesperson told the media that the "impact to personal health and the environment from the use of depleted uranium munitions is likely to be low".
But the decision to supply the ammunition sparked a furious reaction from the Kremlin, with Vladimir Putin pledging on Saturday to retaliate by moving 'tactical' nuclear weapons into Belarus.