Emergency services responded at around 18.20hrs on Saturday, 8 June, to a fairground ride having failed at the Lambeth Country Show in Brockwell Park.
Four people have been taken to hospital. Following a full assessment by medics, a woman in her 40s remains in hospital with life-threatening injuries. A man in his 40s, is also receiving ongoing treatment for potentially life-changing injuries.
The man in his 50s and the 11-year-old girl have both been discharged from hospital.
Officers have attended the scene today alongside the Health and Safety Executive as enquiries continue to establish the full circumstances.