Corden-Lloyd’s battalion was deployed to Northern Ireland in December 1977, at a time when hostilities in the province were at their peak. A few days after their arrival, his troops suffered their first casualties and regular engagements with the Provisional IRA continued over the following weeks. On 17 February, a Green Jackets observation post deployed around the village of Jonesborough began to take heavy fire from the “March Wall”, which drew parallel to the border with the Republic of Ireland to the east, along the Dromad woods. The soldiers returned fire, but the short distance to the border and the open ground prevented them from advancing.
Corden-Lloyd, as commanding officer, along with Captain Philip Schofield and Sergeant Ives flew in a Gazelle helicopter from the base at Bessbrook Mill to assess the situation and provide information to the troops. While flying low and fast over the scene of the engagement, the aircraft came under fire from the IRA. The pilot executed a torque turn and, in so doing, stalled his tail fenestron fan rotor and lost control of the aircraft. The helicopter crashed into the field bordered by the March Wall, some 700 meters from Jonesborough. Corden-Lloyd was killed instantly, while the other two passengers were wounded.
The shooting down of a British Army helicopter and the death of such a high-ranking officer was used as propaganda by the Provisional IRA, which published a report of the action in An Phoblacht. Corden-Lloyd had been accused by republicans of brutality against Catholic civilians during the Green Jackets tour of 1971. Corden-Lloyd was awarded a posthumous mention in dispatches by the British government, “in recognition of gallant and distinguished service in Northern Ireland”.