Strengths
Our description of our intervention has changed substantially through our feasibility work. Refining our programme theory and intervention in this way acknowledges the complexity in health services research and the need to adapt to emerging circumstances. Observing and collaborating with stakeholders, rather than dictating a researcher-led strategy, resulted in an adaptive model of service delivery and may result in a more successful trial with more reliable recruitment. The level of involvement of the OptiBreech PPI group and lay members of our research team has been significant and meaningful. Women’s descriptions in this study are consistent across multiple services and despite varying outcomes.