Dyer, who previously indicated she’d run a split ticket, announced last night she will preference the ALP ahead of the Coalition on her how to vote cards.

Liberal-held Boothby is Adelaide’s most marginal seat.

She said her decision was a result of “deep personal contemplations” and a review of the major party policies. She said the “government is full of climate deniers” and its “proposed model for a National Integrity Commission is a sham at best”.

“The polls suggest voting will be close and my priority is to ensure the Morrison Joyce Government is not re-elected. If it were to be a close vote, I would be disappointed if any of my decisions resulted in their re-election,” Dyer said.

“Despite my strong criticism of many of Labor’s policy positions, or, in some cases, their absence of policy positions entirely, I am aware that this decision will likely lead to another wave of attacks from the Government and their allies claiming I’m a ‘Labor stooge’.

“To me, that will only demonstrate that they are incapable of understanding that there are many Australians outside of the Labor Party who do not support Scott Morrison and what his Government represents.”