For information, Australian government policy on value of human life:
https://www.pmc.gov.au/sites/default...dance_note.pdf
...and
Due diligence - a common law defence against negligence
Where it is possible to guard against a foreseeable risk, which, though perhaps not great, nevertheless cannot be called remote or fanciful, by adopting a means, which involves little difficulty or expense, the failure to adopt such means will in general be negligent.
Chief Justice Sir Harry Gibbs. Turner v. The State of South Australia (1982) (High Court of Australia before Gibbs CJ, Murphy, Brennan, Deane and Dawson JJ).