Interesting research about maternity unit closures carried out by Elaine Kelly on behalf of the Institute of Fiscal Studies published in September 2017.
The study found that units are more likely to close nearer the end of the week (Thursdays, Fridays), even though units experience peaks in demand (in terms of admissions) evenly across the week.
The report Maternity Units under pressure can also be found on https://www.ifs.org.uk/publications/9715 and the slides are on the IFS website https://www.ifs.org.uk/publications/9719 The IFS are continuing the research with more findings coming later in the year.