The UK Ministry of Defence (MoD) has entered into a memorandum of understanding (MOU) with the Ukrainian Government.
UK Defence Secretary Michael Fallon said: "The UK will stand firm with the Ukraine as they defend their territorial integrity. This new defence agreement sets out that commitment as we enhance our training of Ukrainian Armed Forces (UAF)."
Under the terms of the agreement, the countries will share information on potential threats, participate in joint exercises, train UAF personnel and cooperate in the field of military equipment for a period of 15 years.
The UK will also expand the reach of its training support to the UAF.
Ukrainian Armed Forces Minister Penny Mordaunt said: "It was a great honour for me to sign the MOU on defence cooperation with Ukraine, which provides the framework for future cooperation, reiterating our support to them.
"Meeting the UK Armed Forces personnel training UAF troops also reiterates the positive contribution Britain's military makes in the world. We continue to stand side by side with Ukraine through this difficult period."
In the past year, 16 UK teams have trained 2,000 members of the UAF at ten training sites across the country.
The MoD has revealed plans to train another 300 UAF personnel, extending the programme by another year.
Britain has already enhanced the training programme in Ukraine to include additional infantry, medical and survival skills, as well as increased the number of Ukrainian soldiers being trained.
Image: Armed Forces Minister Penny Mordaunt and Minister of Defence of Ukraine General of the Army Stepan Poltorak sign the MOU in Kyiv. Picture: courtesy of Ministry of Defence of Ukraine.