Abstract Background The RAPID-2 intervention has been developed to support women with symptoms of mild-to-moderate anxiety in pregnancy. The intervention consists of supportive discussions with midwives, facilitated discussion groups and access to self-management materials. This paper reports the development of a training programme to prepare midwives and maternity support workers to facilitate the intervention. Methods Kern’s six-step approach for curriculum development was used to identify midwives and maternity support workers training needs to help support pregnant women with anxiety and facilitate a supportive intervention. The stages of development included feedback from a preliminary study, stakeholder engagement, a review of the literature surrounding midwives’ learning and support needs and identifying and supporting the essential process and functions of the RAPID intervention. Results Midwives’ reported training needs were mapped against perinatal mental health competency frameworks to identify areas of skills and training needed to facilitate specific intervention mechanisms and components. A training plan was developed which considered the need to provide training with minimal additional resources and within midwives’ scope of practice. The training plan consists of two workshop teaching sessions and a training manual. Conclusion Future implementation is planned to include a post-training evaluation of the skills and competencies required to fully evaluate the comprehensive programme and deliver the RAPID-2 intervention as planned. In addition, the RAPID-2 study protocol includes a qualitative evaluation of facilitators’ views of the usefulness of the training programme.