Dr Gibbs is taking the court over his notes for the collapse of Child M on 9 April 2016. The prosecution say Ms Letby injected air into the infant's bloodstream causing a near fatal collapse. She denies all charges

Dr Gibbs examined Child M on the morning of 10 April. He said he queried whether infection/sepsis was the cause of the boy's cardio/respiratory collapse the previous day - 'it transpired he didn’t have either of those, so there was no proper explanation', Dr Gibbs said

Dr Gibbs said subsequent X-rays and heart scans offered no explanation for the child's collapse

Dr Gibbs said Child M 'still wasn’t behaving normally' on April 10, he was 'quiet and breathing slow' but he said that was 'explicable for a child that had very nearly died the previous afternoon'. The baby did eventually stabilise and was later discharged

Court has just been read a statement from consultant paediatric cardiologist Dr Arjamand Shauq - he reviewed an ultrasound of Child M's heart on a request from medics at the Countess of Chester. They believed he could have had a thrombosis

Dr Shaq said having reviewed the images the structure 'is not a thombos' but a eustachian valve, which is 'perfectly normal in infants'

Medical expert Dr Dewi Evans, who was approached by the National Crime Agency to review the case in 2017, is now in the witness box

Dr Evans said from his review of the medical notes, he concluded that Child M's collapse was 'completely unexpected'

Dr Evans said: 'this begs the question whether (Child M) received some noxious substance prior to his arrest or a bolus of air via his long line'

Dr Evans said he ruled out infection (like pneumonia) as the cause of Child M's collapse as he would not 'have made such a prompt respiratory recovery' in the hours after

Ben Myers KC, defending, is now questioning Dr Evans. Mr Myers puts it to Dr Evans that if air was injected, it wouldn't just disappear within 30mins. Dr Evans said it would dissipate within the lungs

Dr Evans also says that an 'accidental air injection is virtually unheard of it just doesn’t happen' due to the sophistication of modern medical equipment

Mr Myers puts it to Dr Evans that air is made up of 70/80% nitrogen - which is insoluble in blood at that level, 'it doesn't vanish' Mr Myers said so it would still be present. Dr Evans says it would have dissipated somewhere

Dr Evans says most likely the cardiac compressions resulted in air moving from one side of heart into lung. Mr Myers puts it to the medic that he has no empirical evidence to back up these claims, Dr Evans says it would not be ethical to carry out such research on babies

Mr Myers has brought up a blood gas chart for Child M from April 8. They show it was not monitored for a number of hours - Dr Evans dismisses significance of this, saying 'we try to avoid sticking pins and needles in babies if we can avoid it'

Mr Myers puts it to Dr Evans that Child M's collapse could have been due to 'some residual underlying issue', he disagrees and repeats his belief that air was injected. A claim Mr Myers says he has 'no supporting evidence whatsoever' for

We're now being shown diagrams of the lines from an IV bag to a cannula (Dr Evans said that air could have been injected in through a bung on the line)

Mr Myers is pointing that the bung is there for a rapid injection of say adrenaline and goes into the system very quickly. Dr Evans agrees. That brings to an end Dr Evans' evidence for today - we're now hearing statements of agreed evidence, before another expert after lunch

Medical expert Dr Sandie Bohin, who reviewed Dr Evans' findings, is now in the witness box

Dr Bohin says 'there are very few things that can cause a baby to collapse in this way', she says it doesn't fit with infection or issues with feeds (as he was nil by mouth at the time). She also says there was no issues with his heart, 'this was completely unexpected'

Nick Johnson KC asks Dr Bohin if she believes air was administered with 'malevolent intention' - she says 'yes'

Mr Myers is now questioning Dr Bohin, he puts it to her that there is 'not much' to support her conclusions. She says that the infant suffered a cardiac arrest, 'something caused that, the baby almost died...for me air embolus fitted with that'

Prosecutor Nick Johnson KC has just read a summary of Ms Letby's police interview in relation to Child M. Earlier this week the court heard how after Ms Letby was arrested in 2018, police recovered a blood gas report of Child M under a bed at her home

She told police that there was 'no reason why she had kept it' and that it was an 'error on her part' perhaps not emptying pockets before she left work. She denied taking it to 'remind her of an attack' on Child M

Report from today’s session. Court now adjourned till tomorrow. https://www.bbc.co.uk/news/uk-...