The East of England Ambulance Trust has said chair Maria Ball has resigned.
The Trust says its focus is now solely on improving the service to patients and better support our staff.
Vice-chair Paul Remington said: "We are developing a transformational plan, details of which will be published next week. This will involve recruiting many more front line staff, better managing sickness absence, clearer career pathways and a renewed focus on patient handover delays."
More top news
Norwich midfielder Alex Tettey says that the Canaries could have already been promoted had Alex Neil been in charge for the whole season.
Find out how it's looking for the Bank Holiday Weekend
MK Dons have reportedly had a bid rejected for Brentford striker Will Grigg.