UK military trainers now in Ukraine
British military trainers are now in Ukraine to help those fighting pro-Russian rebels.
Thirty-five personnel are based in Mykolaiv, in the south of the country, the BBC reported.
Defence Secretary Michael Fallon announced last month that the UK would sent up to 75 troops and military staff to the war-torn country.
He said the UK teams would offer advice and training to government forces there in an attempt to boost their resilience while also reducing fatalities and casualties.
An MoD spokeswoman said: "The UK is committed to supporting Ukraine's sovereignty, independence and territorial integrity in the face of Russia's aggression.
"The gifting of non-lethal equipment is designed to prevent further Ukrainian fatalities and casualties and to help improve situational awareness on the ground.
"Our overall aim is to strengthen the defensive capability of the Ukrainian armed forces and build the resilience that they need."
More than 6,000 people have been killed since fighting broke out last April, but clashes have reduced since a ceasefire was declared last month.