‘There is a strong evidence base showing that work is generally good for physical and mental health and well-being. Worklessness is associated with poorer physical and mental health and well-being’. This statement and the evidence behind it is set out in Is work good for your health and well-being ? by Gordon Waddell and A Kim Burton (published by The Stationery Office, 2006). The report argues that it is better to be in work for economic, social and psychological reasons and for the good of physical and mental health.
Fit for Work service
Fit for Work  offers free, expert and impartial advice to anyone looking for help with issues around health and work.
The fit for work website offers free, expert, confidential and impartial work-related health advice via the advice hub 
The referral service is now closed but you can browse online resources.