The NSW Independent Commission Against Corruption has revealed “serious corrupt conduct findings” against former premier Gladys Berejiklian.

The commission, which delivered its findings in a highly anticipated report on Thursday morning, also alleged that former Wagga MP Daryl Maguire, Ms Berejiklian’s secret boyfriend, also engaged in serious corrupt conduct.

The report was tabled in the NSW parliament on Thursday, more than 600 days after public hearings ended.

It is expected to be published online soon. The ICAC website crashed as the reported was released early on Thursday.

ICAC found that Ms Berejiklian “engaged in serious corrupt conduct by breaching public trust in 2016 and 2017” over grants to the Australian Clay Target Association, based in Mr Maguire’s electorate, without disclosing her personal relationship to Mr Maguire.

It said she was “in a position of a conflict of interest between her public duty and her private interest, which could objectively have the potential to influence the performance of her public duty”.

“The commission also finds that in the same period, Ms Berejiklian partially exercised her official functions, in connection with funding promised to ACTA, influenced by the existence of her close personal relationship with Mr Maguire,” it said.

“The commission finds that Ms Berejiklian took a number of actions in relation to the ACTA proposal in circumstances where she knew that Mr Maguire was its principal proponent.”

ICAC had investigated whether Ms Berejiklian breached public trust by failing to disclose her long-time personal relationship with Mr Maguire while she was NSW treasurer and premier.

The commission’s inquiry began as a probe into possible corrupt conduct by Mr Maguire but expanded to Ms Berejiklian after she was compelled to reveal the relationship in public hearings in 2020.

She denied wrongdoing and retained office, only to step down when ICAC in late-2021 began investigating her conduct.

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Even after the relationship was exposed, Ms Berejiklian held onto widespread public support, with net approval ratings of more than 35 per cent.

After quitting office in October 2021, she turned down an opportunity to run for federal parliament and moved into the private sector as an Optus executive.

Ms Berejiklian has always maintained she carried out her duties with the highest level of integrity.

Despite Thursday’s findings, the ICAC is not recommending the Director of Public Prosecutions pursue Ms Berejiklian for any offence.

Delays in the release of the ICAC report into Ms Berejiklian and Mr Maguire have been criticised.

The commission has said delays were caused by complex legal issues and copious submissions.

On Wednesday, the Minns government backed a parliamentary committee’s call for ICAC to develop its own time standards and measure its performance against them.

“[The changes] will increase transparency and public accountability of the ICAC’s reporting functions without imposing inflexible restrictions on the ICAC,” the government said.

Mr Maguire, 64, faces criminal charges stemming from conduct exposed at an earlier ICAC inquiry and giving false and misleading evidence into that inquiry.

-with AAP