In this moving BBC Lifeline Appeal, JJ Chalmers—Invictus Games medallist and former Royal Marine—presents the vital work of Day One Trauma Support, a charity dedicated to supporting people affected by major trauma. Sharing real stories of survival and recovery, the appeal highlights how Day One provides practical, emotional, and legal support to patients and their families from the moment of injury through every step of recovery. As someone who has experienced life-changing trauma himself, JJ brings authenticity and empathy to the message, encouraging viewers to support a service that ensures no one faces trauma alone.