A report by the Herald newspaper highlights the "very unusual" spike in deaths of babies, with the alarm being raised after 18 infants died within four weeks of birth in March.

That same control limit was also breached in September last year, when 21 neonatal deaths were reported, the first time this had occurred since records began.

"The neonatal mortality rate was 5.1 per 1,000 live births in September and 4.6 per 1,000 in March, against an average of 1.49 per 1000 in 2019," reports the newspaper.

Public Health Scotland (PHS) said the deaths could not have been down to chance, while the cause behind the previous spike in September also "remained a mystery."