2:28pm
Professor Owen Arthurs was asked, Mr Myers said, about the position of the tip of the needle [from a radiograph image for Child H on September 26, 2015], and whether it was touching the heart.
He replied he could not tell - it could be several centimetres away, it could be touching.
A doctor wrote for Child H on September 26: 'Possible cause for cardiac arrest could be that a drain is too close to heart and touching pericardium...'
A nursing note: 'At 16.21 [Child H] started to desaturate, no air entry heard, ET Tube suctioned and help summoned from colleague. Crash call...
'Second chest drain noted to be in a different position and 'holes' close to chest wall. Further tegerderm applied and chest drain tubing position altered. Both chest drains bubbling ++ during reintubation...'
Mr Myers says the chest drain was "not well secured and this can't be blamed" on Letby.
He says a desaturation to 56% at 7pm 'should be included in the list of events, but this wouldn't fit as Letby isn't on it'.
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2:32pm
Mr Myers says the key event for Child H happens at 3.20am, hours after the parents left before midnight.
He refers to the second event, the following night, in which he says Letby has "no opportunity to be involved in this".