This paper provides a summary of a proposed PhD project that will be attached to a large randomised control trial (RCT) designed to explore an intervention on the post-natal ward. The research will expand on the findings of the NECOT (North-East Cot) trial by adding a qualitative dimension. The main aims of the NECOT trial are to examine the impact of different cot types used on the post-natal ward and their effect on breastfeeding duration. It is hypothesised that the use of side-car cribs will result in longer duration of breastfeeding than standard practice rooming-in. This project follows-up on the NECOT findings by examining the impact of the intervention on mothers’ breastfeeding behaviour and infant sleep location once they have returned home. Additionally, the acceptability of side-car cribs among the post-natal ward staff will be assessed in order to identify factors that may increase or impede their future use within hospital maternity wards.