Voice to Parliament is set for a No landslide as disastrous new poll for the Yes campaign emerges revealing support for the referendum has plummeted to a record low

Support for the Yes campaign has slumped to its lowest level so far, according to a new poll.

Just over a third of Australians – 36 per cent – say they will vote Yes to the Voice to Parliament, according to the Newspoll survey of 1,239 voters for The Australian. 

It marks a two-point fall in the past three weeks – the lowest level yet for the beleaguered Yes campaign. 

Meanwhile, opposition to the historic referendum has risen slightly to 56 per cent with less than three weeks until polling day. 

The swing towards No is across most age groups and demographics, but most are among women and younger voters who have previously been the strongest supporters of the Voice.

Support among women has fallen from 41 per cent to 36 per cent but the proportion of those saying they would vote No has risen nine points to 57 per cent.

Meanwhile, support for the Voice has risen among men by three points to 36 per cent, while those with university educations have also seen a rise to 54 per cent.

However, of most concern to the Yes campaign will be the fall in support among those aged 18 to 34 which is the strongest support base for the Voice.

Support among that demographic has fallen five points to 50 per cent – down from 70 per cent at the start of the year – while those backing No have risen four points to 41 per cent.

Support for the No campaign has risen across most age groups and demographics but most marked among women and younger voters who have previously been the strongest supporters of the Voice (pictured: a Sydney No campaign rally on Saturday)

Only 77 per cent of 18-to-34-year-old voters said they would definitely or very likely turn out to vote, meaning that the age group most likely to Vote yes was the least likely to turn out to cast a ballot. 

Yet, perhaps most painful for Prime Minister Anthony Albanese to read is that support for the Voice among Labor voters has also dwindled with those approving of the constitutional alteration falling from 61 per cent in the previous Newspoll to 56 per cent in the latest survey.

The poll also recorded a six-point fall in Liberal leader Peter Dutton’s net approval rating since taking the job. It is now at minus 20. 

 Mr Albanese’s improved slightly to plus three.