The number of NHS staff who would recommend where they work as a place to receive treatment has gone down, according to the annual NHS staff survey.

NHS England published the results of the 2014 survey, which collects the experiences and opinions of NHS staff.

• Click here to view the NHS staff survey results

Norfolk and Suffolk's troubled mental health trust posted some of the worst results for mental health trusts across the country.

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Staff were asked if they would be happy with the standard of care provided if a friend or relative needed treatment from their NHS trust and just 36% said they would be, compared with 41% the year before and an average of 60% for other mental health trusts.

Michael Scott, chief executive of Norfolk and Suffolk NHS Foundation Trust, said: 'The results are very disappointing, but not unexpected, as the NHS Staff Survey was held during the Care Quality Commission (CQC) inspection of our trust... We see recurrent themes around staff feeling undervalued, not receiving adequate support or access to things that can help them to develop their full potential.'

He said work was ongoing to make changes, including recruiting for 280 staff roles to ease pressure on the existing workforce.

While the Norfolk and Norwich University Hospital's results worsened in a number of areas compared with 2013, bosses said this reflected the intense and sustained operational pressure of recent months.

In a message to staff, bosses said: 'To put the survey results into perspective, in spite of January being our busiest ever month, it was also the month in which we achieved our highest score from patients in our patient surveys, demonstrating your huge expertise, commitment and dedication.'

The James Paget University Hospital was among the top 20% of acute trusts in the country in eight areas, including for staff motivation and for staff feeling satisfied with the quality of work and patient care they are able to deliver.

Chief executive Christine Allen said it was a positive report but added: 'We will review the findings... in detail to see where further improvements can be made.'

• Do you have a health story? Email kim.briscoe@archant.co.uk