A young person has told a judge how they were groomed by their teacher as a 12-year-old female for ongoing sexual abuse, leaving them a "damaged person".

Kellie Ann-Marie Whiteside, 44, pleaded guilty on Tuesday in Brisbane District Court to one count of repeated sexual conduct with a child.

Crown prosecutor Cameron Wilkins discontinued 29 charges of indecent treatment of a child under 16 against Whiteside.

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Chief Judge Brian Devereaux heard Whiteside was working as a science teacher in a school south of Brisbane when she turned a friendship with the victim into sexual abuse.

Wilkins said Whiteside discussed frustrations in her sex life with her husband and swapped intimate images via Instagram and Snapchat messages with the victim.

"The relationship turned sexual in March 2015. At this time the complainant was still 12 years of age but was soon to turn 13," Wilkins said.

"That relationship ultimately continued past the (victim's) 16th birthday and until it ended in March 2023 when (the victim) was 20 years of age."

Whiteside kissed the young person – who now identifies as non-binary – on school grounds and this led to sex acts committed in soccer club toilets, in car parks and in hotels.

Wilkins said Whiteside used manipulation by giving the victim alcohol and demanding their text message exchanges remain secret.

The victim read their impact statement to Devereaux and said they now found it hard to form meaningful relationships.

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"It is common for me to have panic attacks due to my overwhelming anxiety and fear (that) I will always be a damaged person with a warped mindset."

The victim said their parents now felt guilty as if they had failed to protect them.

"I was taught about stranger danger … I was not prepared for a predator to be an adult who was in a position of power … who was a woman," they said.

"My parents trusted her. I trusted her too."

The victim's mother said major milestone events in her child's life were now "tainted" as Whiteside had been involved.

"We were robbed of the joy of watching our child grow up without fear, in a place we thought was safe," she said.

Defence barrister James McNab said Whiteside had been suffering from post-natal depression and difficulties in her marriage at the time of offending.

"She has now lost her job as a teacher and will never work in the profession again," he said.

McNab said Whiteside made extensive admissions when questioned by police and had attended rehabilitation counselling.

Devereaux told Whiteside she had committed an outrageous breach of the trust put in her as a teacher and had caused terrible consequences for the victim and their family.

"You took advantage of a young child at a difficult time in her life," he said.

"I accept (the psychologist's) opinion that you are not highly likely to offend in this way again."

Whiteside was sentenced to five years' imprisonment and will be eligible to apply for parole in March 2027.

Readers seeking support can contact Lifeline on 13 11 14 or beyond blue on 1300 22 4636.

Support is available from the National Sexual Assault, Domestic and Family Violence Counselling Service at 1800RESPECT (1800 737 732).

Kids Helpline 1800 55 1800.

Australian Treasurer Jim Chalmers has warned that Ex-Tropical Cyclone Alfred and Donald Trump's recent tariffs will put pressure on the federal budget, which is set to be handed down next week.

Chalmers was briefly interrupted by protesters at two times during his speech before they were quickly removed.

A man and a woman held banners reading 'No new coal and gas'.

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"When will the Labor Party stop funding new coal and gas projects?" one asked as security led him away.

"Thank you mate, off you go," Chalmers said.

He went on to warn that Alfred and Trump together could stall growth, and lead to price increases and lingering inflation.

Chalmers warned that the cost of the cyclone recovery could mean an immediate $1.2 billion hit to the nation's GDP.

That would push the total amount earmarked in the budget for natural disaster support to $13.5 billion.

"This could wipe one-quarter of a percentage point off quarterly growth," Chalmers said.

"It could also lead to upward pressure on inflation from building costs to damaged crops raising prices for staples like fruit and vegetables," he said.

"We don't yet know the precise cost to our Budget, but again it will be significant."

The warnings come with inflation currently at 2.5 per cent, and core inflation passing economists' expectations at 2.8 per cent last month.

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Chalmers also said fears of a global trade war and increasing tariffs could dampen Australia's economic outlook.

"The rules that underpinned global economic engagement for more than 40 years are being rewritten," he said.

Chalmers said that the direct impact of steel and aluminium tariffs would be manageable for Australia.

"But when you add in the indirect effects, the hit to GDP could be more like 0.1 per cent by 2030," he said.

"In fact, over a range of scenarios, Treasury found the indirect GDP impacts of a trade war could be up to four times larger than the direct effects of tariffs on our economy.

"In a world of retaliation and escalation, the impacts of tariffs are amplified, they linger for longer, resulting in a bigger reduction in GDP and a bigger increase in prices."

Despite this Chalmers signalled that reciprocal tarifs against the US will not be on the cards:

"Our response to this will not be a race to the bottom on tariffs."

Chalmers will hand down the federal budget next Tuesday night on March 25.

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As Lilie James told a friend she was ready for a "break from boys" her ex-lover was meticulously stalking her and planning a brutal murder at a private school.

An inquest into the death of the popular water polo coach and St Andrew's Cathedral School sports assistant was told of her killer's extensive stalking and "dry runs" before he viciously bludgeoned her in October 2023.

The 21-year-old had days earlier ended her brief relationship with colleague Paul Thijssen, a Dutch citizen in Australia on forged documents.

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A three-day inquest, beginning today, will examine coercive control and unacceptable behaviour in relationships, in an attempt to prevent similar deaths.

The inquest was told the pair – both employed as sport assistants at St Andrew's – had a casual two-month relationship James broke off five days before her murder on October 25.

James told a friend on October 21 she "didn't want to be in a meaningless relationship with Paul" and was keen to "have a break from boys", the inquest was told.

Hours later, without her knowledge, Thijssen began the first of seven stalking events over four days, hiring share cars to drive to her home and local train station.

Images shown to the inquest appeared to be the 23-year-old's attempt to catalogue each car parked near the James' family home.

Dozens of CCTV clips captured Thijssen planning his attack at the school in Sydney's city centre.

In several "dry runs", he rehearses entering the bathroom where he would murder James, practising opening the door with either hand.

He later blocks off one adult bathroom that required a key to enter.

"It is chilling, disturbing footage," counsel assisting Jennifer Single SC said in her opening address.

Single said Thijssen's preparation was calculated.

"It was not a momentary loss of control – it was a premeditated killing," she said.

"The killing itself was overkill."

The inquest revealed Thijssen had stalked an earlier partner and spun a web of deceit about his time in Australia.

His lies duped James, friends, housemates, his employer and – with numerous forged documents – Australian visa authorities.

He doctored letters, payslips and references to support working holiday visas obtained in late 2021 and 2023.

Thijssen told numerous people about being enrolled in a masters of teaching degree, even pretending to go off to study at times.

But police found no record of his enrolment at any Sydney university.

Another lie – which James confronted him about two days before her death – involved Thijssen setting up a fake Snapchat account in another woman's name.

"Paul's reaction to being found out was to lie and to try to paint himself as the victim with another woman stalking him," Single said.

After murdering James, Thijssen took his life in Sydney's eastern suburbs.

His body was recovered two days later.

The Thijssen family says it has evidence his life had "become derailed" before the death but that information has not been provided to the coroner.

The parents of James attended the opening day, although they are not represented by lawyers at the inquest.

eSafety Commissioner Julie Inman Grant is among several expert witnesses to appear during the inquest.

Forensic medical experts are due to give evidence tomorrow morning.

In witness statements, James has been remembered as a gregarious, sporty woman who "it seemed … could do anything."

Her boss said she was wonderful at her role and "always smiling".

Support is available from the National Sexual Assault, Domestic and Family Violence Counselling Service at 1800RESPECT (1800 737 732).

Readers seeking support can contact Lifeline on 13 11 14 or beyond blue on 1300 22 4636.

Tony Magner says he’s embarrassed by the fall from grace.

The five teenagers, aged 15 and 16, will appear in the Whangārei Youth Court.

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The man pleaded guilty to an altered charge on the second day of his trial.

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Australian surf legend Shane Herring, once seen as the country's answer to American powerhouse Kelly Slater, has died aged 53.

He fell down some stairs and hit his head at his home on Sunday, Surfing Life Magazine and Swell Net reported. 

Herring was born on Sydney's Northern Beaches in 1971 and first learnt to surf when his family moved to Dee Why.

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His innovative style of surfing spearheaded his brief but bright career and, alongside Slater, created a shift in technique and approach in the early 90s.

Herring triumphed against Slater during the debut Coca-Cola Classic world championship tour at North Narrabeen in 1992.

But, by the following year, his rankings began to slide until he was unrated by 1995. He struggled with addiction.

Herring lived quietly on the North Coast, occasionally going out on the water for a surf with friends and shaping boards ahead of his death.

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Slater paid tribute to his old rival in a social media post, remembering him for blending the old-school power and pure lines with the new-school mentality and speed in the 1990s.

"In the years we spent traveling and surfing together, I always found Shane to be a kindhearted guy and an extremely talented surfer, but he had his demons that limited his time of greatness," he said.

"He loved the purity in surfing and was uncomfortable with the limelight and notoriety and scrutiny it brought him.

"He made a bigger mark than he might be known for these days and it hurts to know we won't get to catch up again.

"I was really looking forward to seeing and maybe even surfing again in the coming months with Shane, whom I haven't seen in probably 20+ years."

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Finishing up this tribute, Slater said: "Ride on, Shane. We're thinking of ya."

Surfing World Magazine has described Herring as "one of Australian surfing's most blinding talents, and one of its happiest tragic figures".

"A surfing talent like few we'd ever seen in Australian surfing, Herro burned brief but bright in the early '90s before flaming out," the publication wrote.

Justin Crawford said his friend Herring was a "true gentleman never said bad by anyone except concaves in surfboards".

"Rest easy my friend. We had a beautiful friendship and I treasure every colour of the rainbow (you) were. There will be only one," he said.

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The man was found on a footpath in Miramar about 2.20am on Monday.