The jury is set to begin its deliberations in Erin Patterson's trial over the deaths of three relatives and the attempted murder of a fourth.

Patterson pleaded not guilty to deliberately poisoning Don and Gail Patterson and Heather and Ian Wilkinson with death cap mushrooms at a lunch at her Leongatha home in 2023.

After eight weeks of evidence and closing submissions from the prosecution and defence, Justice Christopher Beale has delivered clear final instructions to the jury.

Australian correspondent Murray Olds says Justice Beale went through a long list of evidence for the jury to take into account.

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