During Lucy Letby’s nine-month trial, the court heard extensive evidence about the deaths.

Baby C

The court was told the premature baby boy weighed just 800g (1lb 12oz) when he was born in early June 2015, but despite that, medics recorded that he was in a “good condition” and stable.

He was being kept in the highest priority section of the neonatal unit, but on the night of 13 June, he suddenly stopped breathing.

The court heard Letby, who was the designated nurse in a different section but was present when Baby C collapsed, caused the issue at about 23:15 BST by inserting air into his stomach via a nasogastric tube.

Medics failed to revive him and he was pronounced dead at 05:58 on 14 June.

Baby I

The trial heard Baby I was born prematurely at Liverpool Women’s Hospital and transferred to the Countess of Chester on 18 August 2015.

On 30 September, the baby girl vomited and her heart rate dropped.

She suddenly collapsed again on 13 and 14 October before a fatal deterioration on 23 October.

The prosecution said Letby murdered Baby I at the fourth attempt by administering a fatal dose of air into her bloodstream.

Dr Evans told the trial his “opinion” was that Baby I “had been subjected to an infusion of air”.

“In other words, air had been injected into her stomach. That interferes with your ability to move your diaphragm up and down, and that interferes with your breathing,” he said.

Baby P

The court was told Baby P was in the same room as his triplet brother Baby O, who also died, on the neonatal unit.

After the death of his brother, he was put under close observation as a precaution and at 09:35 BST on 24 June 2016, the baby boy was found to be “self-ventilating in air” and stable.

Fifteen minutes later, he collapsed and required breathing support.

He collapsed several more times on 24 June before being pronounced dead at 16:00 after 45 minutes of unsuccessful resuscitation attempts.

Dr Evans told the trial that, in his view, the collapses were consistent with an “additional amount of air being given to this baby during the morning of 24 June”.