One of the things some people keep criticizing Lucy Letby's defence for is working with chemical and mechanical engineers. They're not doing this instead of working with experts in the body's use of insulin, endocrinologists. They're doing it as well. But people still sneer.
I mention this because the prosecution expert on insulin, Hindmarsh, tried to play both roles at the trial. That meant calculating how much insulin would be needed to give the children's test results. This had to take into account how much would be lost by sticking to the plastic feed bags, since everyone acknowledged that this stickiness would matter.
Since the trial, the defence experts have conducted experiments to work this out. That's engineering work. Your local endocrinologist does not have training or experience enabling him to judge how insulin behaves inside a container we never put it in - that's not his area at all. Would you expect your GP to know how much cough syrup would stick to milk bottle?
Hindmarsh? He just guessed, by his own admission, a figure of 10% sticking to the bag. He gave the court an artificially low estimate of the insulin that would have been needed, playing down the problem that no insulin went missing from the wards stock by pretending so little was needed.
I wouldn't call him reliable.