It is three years since she survived the terrorist attacks in London on 7 July 2005. Ms Harrison, who was badly injured by a bomb on the Piccadilly Line, featured in the Channel 4 programme, The Miracle of Carriage 346, to mark the event.
She not only saved her own life by applying a tourniquet to her left leg but then proceeded to calm other passengers, despite being trapped beneath a handrail. As a result of her injuries, her left leg had to be amputated though her right leg was saved by plastic surgery.
Ms Harrison returned to work in January 2006 and has also become an ambassador for Disability Snowsports UK after discovering a passion for skiing during her rehabilitation.