13 July, 2017
The government's refusal to publish the full report angered opposition parties which accused ministers of trying to protect allies such as Saudi Arabia which has always been accused of being a source of extremist funding, something it has long denied.
In a written statement Amber Rudd, the Secretary of State for the Home Office, said: "Having taken advice, I have decided against publishing the classified report produced during the review in full".
The report, commissioned by former Prime Minister David Cameron in November 2015, was handed to the government past year, and ministers have been under pressure to release its findings following three deadly attacks in Britain since March, which have been blamed on violent armed groups.
Opposition parties claimed the report was being "suppressed" to protect Saudi Arabia which has been accused of being a source of extremist funding.
In a summary the Government said the main findings of the report were that Islamist extremist organisations were generally funded by "small, anonymous public donations" but that "for a small number of organisations with which there are extremism concerns, overseas funding is a significant source of income".
Ms Rudd came under fire for refusing to publish the results of a long-awaited probe into United Kingdom extremists' finances.
Rudd's statement does not name any countries found to be important sources of funding for fundamentalist groups, a fact that some suspect is a deliberate omission to shield Saudi Arabia.
Rudd said a brief outline of the report suggests that there is concern that some Islamic organizations are posing as charities in order to "take advantage of Islam's emphasis on charity".
It also found some Islamic organisations of concern are being deliberately vague about their activities and their charitable status to maintain a level of public credibility.
"Those giving may not know or support the organisations' full agenda", Rudd stated, citing the Home Office's report, adding that some of the organizations receive hundreds of thousands of pounds per year.
She added: "Overseas support has allowed individuals to study at institutions that teach deeply conservative forms of Islam and provide highly socially conservative literature and preachers to the UK's Islamic institutions".
Some of those individuals have since become of "extremist concern", the report added.
"The bottom line is that this report still remains unpublished".
And Green Party co-leader Caroline Lucas also attacked the review for withholding information.
The decision comes two days after the High Court ruled that the Government was not breaking the law by continuing to licence arms sales to Saudi Arabia - the state thought to be the focus of the report.
Liberal Democrat leader Tim Farron said further detail was needed.
The summary said that tackling the problem of extremist funding would need a range of measures, notably connected to domestic sources of support.
The government would also be "directly raising issues of concern, supported by evidence, with specific countries as part of our wider worldwide engagement on countering extremism and violent extremism", it added.