Jonathan Fagge, chief executive of the Norwich Clinical Commissioning Group, said the money would make a significant difference but it was only a short-term solution.
Chief nurse at Brighton and Sussex University Hospitals NHS, Sherree Fagge, said the trust had been working closely with staff during an "incredibly difficult and challenging period".
Chief nurse Sherree Fagge urged people with less urgent or minor illnesses and injuries to consider alternatives to the emergency departments, such as the Brighton Station Health Centre.