The Royal Engineers of the British Army will stay in South Sudan until April 2020 in order to support the ongoing UN peacekeeping mission.
A team of 300 British Army engineers will remain to support the UN-backed initiative, which aims improve the conduct of peacekeeping in the region, including training, equipment, leadership and rapid response capability.
UK Defence Minister Lord Howe said: “We remain unwaveringly committed to international peace and security, and this extension is a demonstration of that.
“It’s all part of the UK’s efforts to deliver stability worldwide, which will help tackle issues like terrorism and mass migration, keeping us safe at home, as well as improving lives internationally.”
The UK is also supporting Vietnam’s first UN troop deployment as it prepares to take over the operation of a field hospital in South Sudan from the UK next year.
Howe has also signed a statement of intent with Bangladesh to sell two Royal Air Force (RAF) C130J transport aircraft to the Bangladeshi Air Force.
The revenue generated from the sale is expected to be reinvested into the UK defence forces.
The C130Js are intended to assist Bangladesh in playing a leading role in future UN peacekeeping missions.
Almost 80 countries and five international organisations previously met at the 2017 United Nations (UN) Peacekeeping Defence Ministerial in Vancouver to discuss ways to ensure peacekeeping.