Introduction The National Health Service (NHS) is the biggest employer in the United Kingdom (UK). Depression and anxiety are the most common reasons for sickness absence in the NHS. As part of a trial feasibility study, we developed an intervention to facilitate an earlier return to work (RTW) in NHS staff absent with common mental health disorders (CMHD).

Methods We used iterative methodology, based on MRC guidance. Evidence was sought from systematic reviews, guidelines, and work known to the research team on the key components of the case-management (Stage 1). During Stage 2, the evidence from Stage 1 was mapped onto the proposed intervention together with input from international experts and key stakeholders.

Results Evidence suggests that an intervention based on a case-management model using a biopsychosocial approach could be cost-effective and lead to earlier RTW. In our study, specially trained occupational health nurses will deliver the intervention. Case-management will be conducted during regular consultations (every 2 to 4 weeks). Key components will include: identifying obstacles to RTW, collaborative problem solving based on cognitive behaviour principles focussing on work outcomes, work-focused goal setting, development of a RTW plan, and peer support to increase return to work self-efficacy. Work adjustments, work visits or therapeutic RTW will be considered. The case-manager will communicate with the line and human resources managers and treating healthcare professionals after each consultation. A bespoke information leaflet will be developed and given to line managers and workers emphasising the therapeutic importance of early RTW.

Discussion To our knowledge WB2W is the first intervention addressing RTW among UK healthcare staff with CMHDs. A key output from this research will be a complete specification of the intervention package including a manual for training the case managers and practical service information to guide the design of a randomised controlled trial.