“I was very surprised that large numbers of people had contacted me to say they had been moved by it.”
Money raised by the single will go towards a memorial to the 22,442 men and women under British command who died during the Allied landings and the Battle of Normandy.
Aged just 15 at the time, Mr Radford served as a galley boy on a merchant navy ship called Empire Larch and remains the youngest-known veteran.
The ship’s crew helped to build the Mulberry harbour off Gold Beach, allowing the Royal Navy to transport troops, vehicles and supplies for the landing.
Scarred by his memories of the D-Day battle, Mr Radford said: “There were thousands of guns firing… thousands.
“Every ship, all those 7,000 ships were firing, bombarding and there was flak coming back still.
“Gold Beach was a terrible sight. It was piled high with equipment and burning landing craft but as we got closer you could see a lot of bodies.
“Dead and wounded men. On the sand and in the water.
“It was fairly clear to us all we were in a nightmare situation.”
Mr Radford wrote the song after an emotional return to Arromanches-les-Baines in Normandy in 1969.