The hotel booking mix-up that could free mushroom murderer

Last July, hundreds descended on Australia's Gippsland region from around the country for the most exciting event on the annual table tennis calendar.

But as elite players vied for medals at the national championships, one of the biggest criminal cases in the nation's history - that of mushroom murderer Erin Patterson - was unfolding just a few kilometres away.

This tournament inadvertently became part of a perfect storm which the triple killer's lawyers are now arguing "fatally undermined" the fairness of her trial.

The jury which condemned Patterson to prison were supposed to be isolated - sheltered from the frenzy surrounding the case while they deliberated.

But accommodation shortages in the region, exacerbated by the table tennis competition, meant they shared a hotel with members of the prosecution, a key police witness, and journalists.

Now Patterson's legal team is trying to overturn her convictions on appeal.

"The only proper remedy is... the order for a re-trial," Patterson's barrister Richard Edney said.

When Patterson served her estranged husband's relatives a poisonous mushroom-laced lunch in 2023, killing three and gravely injuring another, she thrust the sleepy Gippsland region into the global spotlight.