A spokesman said the death came as forces sought to disrupt insurgent activity in the Kopak region of Nahr-e Saraj, Helmand Province, Afghanistan.
Dubbed Operation Kapcha Shkar Kawel, or 'Cobra Hunt', the mission saw more than 40 riflemen from D Company 5th Battalion the Rifles and Afghan security forces set out to disrupt the insurgency and gather intelligence on Taliban leaders in the area.
After two hours Taliban fighters began to fire on the troops.
One of the fighters was tracked by an Apache gunship, and when he opened fire the Apache replied with a Hellfire missile.
The 5 Rifles soldiers and the Afghan army troops were then able to finish their mission and gather crucial intelligence during the operation in mid-December.
It was later discovered that the insurgent killed in the Apache strike was a senior commander in the local area. Read More