The East of England Ambulance Trust, which has consistently failed to meet response times, has been slammed for failing to listen to staff.
A plan to transform patient care and boost staff morale has been launched by the East of England Ambulance Service NHS Trust.
MPs have met with bosses from the East of England Ambulance Service to raise their concerns about issues including poor response times.
A sixth director has quit the beleaguered East of England Ambulance Service.
The Director of Emergency Operations Neil Storey has left after 14 years with the ambulance trust.
Mr Storey is the latest director to resign after sustained criticism of the East of England Ambulance Trust by regulators and politicians over slow response times in rural areas and poor leadership.
Five non-executive directors resigned from the Trust in June.
The Trust said he was "taking the opportunity to move onto pastures new whilst a directorate restructure takes place internally."
Chief Executive Andrew Morgan said: “I would like to personally thank Neil for his absolute commitment and dedication to the ambulance service over the last 14 years.”
Essex MP Priti Patel has welcomed the resignation of five non-executive directors of the East of England Ambulance Service NHS Trust.
The Conservative MP for Witham led a parliamentary debate on the short-comings of the Ambulance service on Tuesday.
Ms Patel said: “The priority now for the Trust is to continue to improve services to patients, get their finances in order and appoint new non-executive directors who have the skills and expertise to achieve this.
"A new leadership team at the Trust will help restore public confidence and support the work being undertaken by paramedics and other staff on the frontline.”
The remaining non-executive directors of the East of England Ambulance Service have resigned. Margaret Stockham, Paul Remington, Anne Osborn, and Phil Barlow are all leaving with immediate effect.
The Service has been the subject of recent criticism over response times.
Dr Geoff Harris, new Chair of the Trust, said: “This is a line in the sand for the Trust and I thank the Non-Executive Directors for their collective action. "
"We must maintain our focus on continuing to drive up the service to patients whilst I focus on putting a new Board in place.”
The Ambulance Trust says the recruitment process for new Board members has started and two of the posts are already being advertised.
One of five Non-Executive Directors at the East of England Ambulance Service has resigned. Caroline Bailes announced her decision to step down earlier today.
Yesterday MP's debated the state of the service in parliament, following criticism about their poor response times. MP for Witham, Priti Patel, has welcomed the news but said there are still four more board members "who should quit too".
MPs from across the East have told Parliament poor ambulance response times across our region are the fault of management and that five non-executive Board Members at the East of England ambulance service must resign. An earlier report noted a sense of "helplessness" among running the Trust.
In a special Parliamentary debate MPs highlighted cases where constituents have had to wait too long for ambulances.
Responding to the debate Health Minister Anna Soubrey said the Ambulance Trust had "abandoned" some rural parts of the region .
Health MInister says East of England ambulance service has in some cases " abandoned" people in rural areas
Health Minister - There are too many stories of patients having to wait too long in distressing situations for ambulances in East of England
A damning report exposing how an ambulance service in East Anglia is failing the people who need it most has been published.
Poor ambulance response times, weak leadership and rising levels of staff sickness are just some of the findings of the new report into the East of England Ambulance Service.
The Trust covers Bedfordshire, Cambridgeshire, Essex, Hertfordshire, Norfolk and Suffolk and a population of nearly 6 million.
But all too often, the report says, patients are being let down. Now, 25 recommendations have been made to turn the failing Trust around.
The new chairman of the East of England Ambulance Trust, Dr Geoff Harris, says the report's recommendations will be implemented quickly.
Dr Harris said: "One of the first tasks will be for me, with the board, to review the findings of this report and submit a formal response to the NHS Trust Development Authority.
"Any changes needed to our existing turnaround plan, which the trust published in April, to incorporate the recommendations will be implemented promptly."
The Suffolk Coastal MP Therese Coffey says the problems of the East of England Ambulance Service are "just about budget."
Ms Coffey said it is entirely to do with "management, governance and leadership."