Lord was born St Mary's Avenue, Cork, Ireland, the son of Samuel Lord , a warrant officer in the Royal Welsh Fusiliers and Mary Lord in October 1913.
After the First World War the family were posted to India and Lord attended Lucknow Convent School. On his father's retirement from the Army the family moved to Wrexham and then David was a pupil at St Mary's College, Aberystwyth before attending the English Ecclesiastical College, Valladolid, Spain to study for the priesthood. Deciding the priesthood was not the career for him he returned to Wrexham before moving to London in the mid 1930's as a freelance writer. He enlisted in the RAF in 1936.
Lord was awarded the Distinguished Flying Cross during 1943 and by January 1944 had returned to the UK for sevice with No. 271 Squadron (based at Down Ampney, Wiltshire training to drop paratroops, supplies and to tow gliders. He then took part in the D-Day operations in June 1944.
On 19 September 1944 during the Battle of Arnhem in the Netherlands, the British 1st Airborne Division was in desperate need of supplies. Flight Lieutenant Lord, flying Dakota KG374 through intense enemy anti-aircraft fire was twice hit and had one engine burning. He managed to drop his supplies, but at the end of the run found that there were two containers remaining. Although he knew that one of his wings might collapse at any moment he nevertheless made a second run to drop the last supplies, then ordered his crew to bail out. A few seconds later the Dakota crashed in flames with its pilot.
Only the navigator, F/Lt Harold King survived, becoming a prisoner of war. It was only on his release in mid 1945 that the story of Lord's action was known, and David Lord was awarded a posthumous Victoria Cross. David Lord is buried alongside his crew in Oosterbeek Military Cemetery, near Arnhem.