Since the unjustified smothering of the Normal Birth Campaign by the RCM about 4 or 5 years ago and the removal of the excellent NBC resources from the RCM website, there has been very little of interest on it.
https://www.rcm.org.uk/media/3559/what-if-my-midwifery-continuity-team-is-organising-how-we-work-a4-4pp_6.pdf
It's a little sparse on detail but the issue of proper rostering and staffing is fundamental to CoC and it is faintly encouraging to see the RCM has some grasp of this.