Scottish television presenter, public speaker and Invictus Games medallist.His full name is John-James Chalmers, and he is 33 years old.
He said he had "terrible posture" because of his injuries, as he sustained devastating injuries in an IED blast during his time as a Royal Marine.
Chalmers said he did not want any special treatment in the series. He said: "I'm on the show... as ultimately I want to come along and give it my absolute everything.".
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