Dr Dewi Evans was approached by the National Crime Agency to review the case in 2017. In a report he produced in 2018, Dr Evans set out that a number of babies in this case died as a result of an intentional injection of air into the bloodstream

Dr Evans is talking the jury through his assessment of Child E's condition in the days before his death. He says that the infant's bloods, white blood cell levels, saturation were as 'stable as you can get'....'he was active and pink, all was satisfactory'

Dr Evans is summarising that for the first five days of Child E's life he was 'stable' and that there was nothing to suggest there was 'something wrong' with him

The court is being shown heartrate and respiratory charts from the day before Child E's death, again Dr Evans says these show he was a 'stable' and 'well little baby'

Asked if it was a point of concern that the baby needed insulin, Dr Evans says 'no', he explains 'he needed insulin to control his glucose values, that’s fine, that’s what neonatal units are for'

We're now looking at medical notes and charts from the evening before Child E's collapse and death. Between 18:00 and 21:00, Dr Evans says everything was 'normal' and 'stable'

Dr Evans is now giving his overall observations of Child E. He explains the reason for the need for insulin was that as a premature baby, his own insulin production had not yet kicked in. He notes that the baby was at risk of necrotising enterocolitis (NEC)

This is a condition that can affect newborn babies, where tissue in the bowel (small and large intestines) becomes inflamed - doctors were aware of this at the time and held off with oral feeds for the first few days of his life

Dr Evans is asked if NEC is a 'viable' explanation for what happened to Child E, he says 'no'

Earlier this week, Child E's mother told the court that the evening before her infant son died, she found him with "blood on his face" and making "horrendous" sounds. Dr Evans said this is 'difficult to explain'

He adds: 'This is not something I've seen other than in this case'

Asked for his reasoning behind Child E's death, he said there are 'two major' factors - he says the baby suffered some kind of 'trauma' which caused gastric bleeding. He says there is no innocent explanation for this and says it could have been caused with a 'stiff' implement

The second reasoning is air embolism - the intentional injection of air into the bloodstream

On the intentional trauma that Dr Evans cites, Ben Myers KC, defending, put it to the medic that he was "looking for possible items just to support the allegation, than simply looking at all the available facts".

Dr Evans repeated that he believed Child E was subjected to a trauma that did not result from a 'natural phenomenon'. He earlier suggested this could have been caused by the inappropriate use of a surgical tool known as an introducer (a thin piece of wire covered in plastic)

Another medical expert Dr Sandie Bohin, who reviewed Dr Evans' reports on this case, is now in the witness box.

Dr Bohin is now going back over Child E's medical notes and the chronology of his collapse.

Dr Bohin said it was 'a poor decision' not to carry out a post-mortem on Child E. The senior paediatric consultant responsible, who cannot be named for legal reasons, told the court earlier this week that they "now regret" not recommending a post-mortem

Dr Bohin is asked about Child E's gastric bleed. She says she has 'never' seen a nasogastric (feeding) tube causing that damage - she says the infant lost 25% of his blood volume as a result

She says she was left 'clutching at straws' to explain such a haemorrhage. One explanation she found was an extremely rate condition (only six cases globally recorded since 1968) called Dieulafoy's lesion

She said this condition is where an artery within the stomach wall spontaneously haemorrhages as a result of some inflammatory process in the gut wall

Court is now taking a short break.

Wrap up of this morning's evidence 👇 https://www.bbc.co.uk/news/uk-...

Dr Sandie Bohin is being cross examined by Ms Letby's defence lawyer Ben Myers KC - she agrees that Child E was at 'higher risk' than other newborns, given his premature birth - but does not accept he was at a higher risk of death

Prosecution have just read a summary of Ms Letby's police interviews in 2018 and 2019 in relation to the death of Child E. Ms Letby denied causing any intentional harm to the infant.

Court has now adjourned, back Monday