The deployment of (Trainee) Associate Psychological Practitioners (T/APPs) to deliver brief psychological interventions focusing on preventing mental health deterioration and promoting emotional wellbeing in General Practice settings is a novel development in the North West of England. As the need and demand for psychological practitioners increases, new workforce supply routes are required to meet this growth.

To evaluate the clinical impact and efficacy of the mental health prevention and promotion service, provided by the T/APPs and the acceptability of the role from the perspective of the workforce and the role to T/APPs, patients and services.

A mixed-methods design was used. To evaluate clinical outcomes, patients completed measures of wellbeing (WEMWBS), depression (PHQ-9), anxiety (GAD-7) and resilience (BRS) at the first session, final session and at a 4–6 week follow-up. Paired-samples t-tests were conducted comparing scores from session 1 and session 4, and session 1 and follow-up for each of the four outcome measures. To evaluate acceptability, questionnaires were sent to General Practice staff, T/APPs and patients to gather qualitative and quantitative feedback on their views of the T/APP role. Quantitative responses were collated and summarised. Qualitative responses were analysed using inductive summative content analysis to identify themes.

T-test analysis revealed clinically and statistically significant reductions in depression and anxiety and elevations in wellbeing and resiliency between session 1 and session 4, and at follow-up. Moderate–large effect sizes were recorded. Acceptability of the T/APP role was established across General Practice staff, T/APPs and patients. Content analysis revealed two main themes: positive feedback and constructive feedback. Positive sub-themes included accessibility of support, type of support, patient benefit and primary care network benefit. Constructive sub-themes included integration of the role and limitations to the support.

The introduction of T/APPs into General Practice settings to deliver brief mental health prevention and promotion interventions is both clinically effective and acceptable to patients, General Practice staff and psychology graduates.