The x-ray is the entire reason Dewi Evans said baby c was murdered though. He looked at the x-ray, said the air in the baby’s stomach is definitely evidence of murder, Letby did it.
So when we find out that Letby had not met the baby before the x-ray was taken, that MUST mean either:
a) someone else murdered the baby by the air method, as LL couldn’t have
b) Evans was wrong that the x-ray showed evidence of murder, so the air must have got there by natural means
Both of those options raise enough questions about at least baby c’s death that it needs looked at again. I would also argue that they raise questions about Evans’ reliability as an expert witness - and that’s before you consider he made up an entirely new theory on the stand when he realised his original theory meant LL couldn’t have done it (the article has the details about this).
Also, the x-ray was the ONLY evidence of foul play in baby C’s case. Without that, the only evidence that Letby murdered him is that she was near him when he died. Well it was a NICU, there would always be a nurse near any baby when it died!
You could literally pick any baby who died unexpectedly and accuse the nurse who happened to be near it at the time of murdering it and it would be the same strength of evidence that we have for LL murdering baby c