Disclosure of interests
EL is a member of University of Bristol (UoB) and part of his salary is paid by PROMPT Maternity Foundation (PMF) to UoB; PMF has received funding from a Saving Lives at Birth award via a subcontract from Becton, Dickinson and Company (BD) to conduct preclinical simulation studies of the Odon Device, these funds have been used towards the salary of TJD and JFC when undertaking the simulations studies. All other authors report no competing interests.