Health regulator Monitor has warned Derby's hospital trust to make "urgent improvements" or face further action.
Monitor's regional director Adam Cayley said it was "disappointing" that Derby Hospitals NHS Foundation Trust had so far failed to comply with an action plan drawn up after previous inspections - and said the regulator would consider making changes itself if inspectors do not see improvements soon.
We agreed a clear plan of action with the trust, so it is disappointing to see that it has been unable to deliver on the commitments it made in April.
Patients expect that they will be seen quickly and receive good quality care from their local hospital.
For this to happen, a trust needs to be well run. Derby must ensure immediate and effective action is now taken.
Monitor will have to consider what changes will need to be made if the trust does not demonstrate rapid improvements.
Health bosses have demanded "immediate improvements" at a Midland hospital trust after finding repeated failures.
Derby Hospitals NHS Foundation Trust, which runs the city's Royal Derby Hospital, has plunged into £1.9million of debt, while failing to make sure 95 per cent of accident and emergency patients were seen within four hours of arrival.
Monitor, which regulates foundation trusts, has also expressed concern that the trust is not doing enough to tackle the number of cases of C.diff - and has said it believes the failures could indicate "wider problems" in how the trust is run.
A 37-year-old man has been arrested by police investigating the death of a seven-month-old baby in Chaddesden, Derby.
Officers were called in after the baby boy was taken into the Royal Derby Hospital on Tuesday May 8. He was transferred to the Queen’s Medical Centre in Nottingham where he died late on Wednesday night (May 9).