A survey of frontline ambulance in our region has revealed the increasing pressure they face - with some working up to 19-hour shifts.
UNISON surveyed more than 900 frontline staff at the East of England Ambulance Service.
It highlighted the impact on their mental health and some staff said they regularly working 15-hour shifts.
UNISON, which has also commissioned a film to highlight the issue, wrote to the trust's chief executive last year - calling for specific measures to reduce enforced overtime, which they say had not been honoured.
But the trust has insisted that it has "excellent" support facilities available to staff - and that it considers their wellbeing to be "of paramount importance".
It accepts that working late is on of the biggest issues and says it has tried to work with UNISON to find solutions which have not "achieved the desired outcomes".