The series isn't a true story but it has been inspired by the real-life experiences of former NHS doctor Grace Ofori-Attah, who moved into screenwriting following a 15-year medical career.
The actor who plays the Paramedic actually trained to work as a medic with the Ambulance Service and was employed by the National Health Service for 18months, during which time he covertly filmed real patients for an exposé with Channel 4.