Boyd-Rochfort was born on 1st January 1880, the eldest son of Major Rochfort Hamilton Boyd-Rochfort, and the grandson of George Augustus Boyd-Rochfort, both of Middleton Park House, County Westmeath, Ireland.
He was educated at Eton and Trinity College, Cambridge, where he was whip of the Trinity Foot Beagles. Boyd-Rochfort was commissioned as a second lieutenant in the Scots Guards in April 1915.
He was 35 years old, and a second lieutenant in the Scots Guards, British Army, (Special Reserve, attached to 1st Battalion) during the First World War when the following deed took place for which he was awarded the VC.
At 2 a.m. on 3 August 1915 in the trenches between Cambrin and La Bassée, France, a German trench-mortar bomb landed on the side of the parapet of the communication trench in which Second Lieutenant Boyd-Rochfort was standing, close to a small working party of his battalion. Instead of stepping back into safety he shouted to his men to look out, rushed at the bomb, seized it and hurled it over the parapet where it at once exploded. This combination of presence of mind and courage saved the lives of many of the working party. Boyd-Rochfort relinquished his commission in 1920 with the rank of captain. After a career as a polo player and jockey Boyd-Rochfort went on to become a horse breeder and trainer until he died on 7th August 1940.