Paul Dadge became the unwitting face of the 7/7 rescue effort after a picture of him helping a woman in the aftermath went around the world.
Paul was on his way to work when he was told his train was terminating at Paddington station due to 'electrical problems' on the Tube, he told Good Morning Britain.
He walked to the next stop - Edgware Road - where he found the walking wounded bewildered and frightened on the street.
As a former firefighter Paul immediately stepped in to help, however he said it was not his training which led him to lend a hand, saying it was: "common sense to help."
Mohammad Sidique Khan, 30, detonated an explosive in his backpack on the train near Edgware Road, killing six and injuring 163.
Paul said it was hours before he realised that there had been an organised attack on the capital.
Paul said that it was the photograph which ended up on the front page of newspapers and websites around the world, which changed his life.
He became such a recognisable part of the July 7 London bombings that he says he: "tries to use it to good effect in terms of talking out against terrorism and I was back on the Tube train on the Monday morning as a show of defiance."