Private Karl Hinett was 19 years old when he suffered horrific burns in a petrol bomb attack during a rescue mission in Iraq in 2005.
And in just seven years the 27-year-old has completed 126, including races at both poles, raising £50,000 for the hospital in the process.
He added: “The people there saved my life but the injury goes on for years, and the work the hospital did helped me get back on my feet."