Colchester Hospital Trust has "lost the confidence of patients and the public", Unison have said as they welcomed the decision to place the trust in special measures.
The trade union called for a "full and thorough investigation" into the hospital last week following claims that staff were "bullied" into falsifying the records of cancer patients.
Unison regional head of health Tracey Lambert said:
The decision to take Colchester Hospital into special measures is the right one.
The trust board has lost the confidence of patients and the public in north east Essex and people want to see strong, positive action to improve health care at the hospital.
Unison members alerted executive directors at the hospital that they were being bullied into falsifying data relating to the treatment of cancer patients, but their concerns were not dealt with.
In light of what has happened at Colchester, there is a need for a significant change of leadership and we look forward to working with the new regime.