The "uncertainty and chaos" caused by a no-deal Brexit would put patients and staff at risk.
Between December 2017 and November 2018 NHS staff took 17.7 million sick days.
Current legislation specifies minimum working temperatures, but not a maximum.
Experts have warned that Britain’s decision to leave the EU is exacerbating the NHS’s growing staffing crisis.
Poor staffing levels and Brexit were also cited amongst the top reasons for quitting.
It is estimated that thousands of NHS staff in England have found their take-home pay drop.
Over four-hundred nursing associates have joined the register in the past two months.
One half of hospital staff in England say they wouldn’t eat the food served to patients because it’s unhealthy and of poor quality.
1 in 8 nursing posts are vacant and on current trends, we will soon be short of 180,000 nurses.
“Staff in mental health services are facing burnout as a result of years of underfunding."
The union claims the Governments failure to act is having a direct impact on patient care, as outsourced staff leave in search of better-paid jobs.
The basic salary paid to MPs will have risen by £13,730 since April 2010
The Department of Health and Social Care claims the plans will make a positive change to sickness absence rates, staff performance and retention.
Unions have branded the 'huge increase of fees' as a ‘tax on practising’.
The survey revealed that staff working in acute hospitals, mental health, primary care and community care are hit the hardest by staffing shortages.