He was joined at the event with wife, who wore cheery, bright midi-dress

The Prime Minister hinted at further action against Islamic State terrorists

Also lashed out at a failure to integrate that has put the nation 'in danger'

Attack: David Cameron is seen speaking at the Tory conference, where he yesterday launched an attack on the 'passive tolerance' of Islamist extremism

David Cameron yesterday launched a blistering attack on the 'passive tolerance' of Islamist extremism and a failure to integrate that has put Britain 'in danger'.

The Prime Minister said there were parts of the UK where 'you can get by without ever speaking English or meeting anyone from another culture', and announced new powers to close down religious schools, or madrassas, which children attend before or after school.

To loud applause at the Tory conference, Mr Cameron warned: 'For too long, we've been so frightened of causing offence that we haven't looked hard enough at what is going on in our communities.

'This passive tolerance has turned us into a less integrated country; it's put our children in danger. It is unforgiveable.'

The 'shadow of extremism is hanging over every single one of us' and the fight to defeat it was a 'fight for our existence', he said.

In a wide-ranging speech, Mr Cameron:

Hinted at further action against Islamic State terrorists, saying 'we will never be safe here in Britain until we eradicate that death cult';

Suggested fewer people should be sent to prison, with more convicts let out with electronic tags;

Won a standing ovation as he declared the Tories wanted to ensure this is 'the generation that ends discrimination';

Warned social services departments they face being taken over if they fail children in care;

Defended Britain's refusal to take part in the EU's quota system for refugees fleeing Syria;

Pledged a 'crusade' to boost housebuilding.

Mr Cameron promised a renewed war on preachers of hate. A new team of inspectors will carry out regular checks on madrassas for signs that youngsters are having their minds 'poisoned'. Under a new law, inspectors will be able to ban individual religious instructors or shut the schools altogether.

There are about 5,000 religious schools in the UK, 2,000 of them madrassas.

Last night, the Muslim Council of Britain said it was 'concerned', adding: 'It is neither Islamic, nor prevalent in madrassas, to be isolationist or to preach hate of other faiths.'

In his most hardline comments yet, Mr Cameron insisted: 'We need to confront – and I mean really confront – extremism. When I read what some young people born and brought up in this country are doing, it makes me feel sick.

Taking action: As part of his wide-ranging speech, Mr Cameron hinted at further action against Islamic State terrorists (file picture), saying 'we will never be safe here in Britain until we eradicate that death cult'

Speech: He also suggested fewer people should be sent to prison, with more convicts let out with electronic tags - and he declared that the Tories wanted to ensure this is 'the generation that ends discrimination'

'Girls not much older than my eldest daughter, swapping loving family homes and straight-A futures for a life of servitude under IS, in a land of violence and oppression.

'Boys who could do anything they wanted in Britain – who have benefited from all this country stands for – instead ending up in the desert wielding a knife.

'This ideology, this diseased view of the world, has become an epidemic – infecting minds from the mosques of Mogadishu to the bedrooms of Birmingham.'

He said Britain needed to 'tear up the narrative that says Muslims are persecuted and the West deserves what it gets'.

Mr Cameron made a fierce attack on the failure of some communities to integrate.

He went on: 'We need to tackle segregation. There are parts of Britain today where you can get by without ever speaking English or meeting anyone from another culture.

In good spirits: Samantha Cameron, 44, refused to let the Manchester drizzle dampen her spirits yesterday, and sported a cheery bright midi-dress as she arrived hand-in-hand with her 48-year-old husband (above)

'Zoom in and you'll see some institutions that actually help incubate these divisions. Did you know, in our country, there are some children who spend several hours each day at a madrassa?

'In some madrassas we've got children being taught that they shouldn't mix with people of other religions; being beaten; swallowing conspiracy theories about Jewish people.

'These children should be having their minds opened, their horizons broadened – not having their heads filled with poison and their hearts filled with hate.'

He continued: 'Let me say it right here: no more passive tolerance in Britain. We've passed the laws – now I want them enforced. People who organise forced marriages – I want them prosecuted.

Let me say it right here: no more passive tolerance in Britain. We've passed the laws – now I want them enforced Prime Minister David Cameron

'Parents who take their children for FGM – I want them arrested.'

On integration, the PM said his ultimate aim was that 'when the child of immigrants sees our flag, he feels so loyal to this country – his country – he wants to put on a uniform and defend it'.

Mr Cameron also defended his decision to use drones to kill two British IS terrorists.

He said: 'I took decisive action to keep Britain safe – and that's what I will always do. Some think we can contract that out to America. We shouldn't. We must play our part too.'

Ukip leader Nigel Farage criticised the speech. He said: 'On social reform, he paints the picture of a more integrated and proud society, when it is the vast influx of people overwhelming communities' abilities to bind together.

'This is the Prime Minister who oversaw the surge in net migration to 330,000 people last year alone. Higher than ever before.'

He added: 'The very immigration causing the social division and housing crisis David Cameron is promising to solve, cannot be contained while we live in a borderless Britain.'

The heir to Blair veers towards centre ground

By JASON GROVES, DEPUTY POLITICAL EDITOR FOR THE DAILY MAIL

The Prime Minister set out his vision for a 'Greater Britain' yesterday, in a speech that was long on social reform, but silent on immigration.

Mr Cameron was dubbed the 'heir to Blair' as he used his conference speech to plant the Conservatives firmly in the centre ground of politics in a bid to lock Labour out of power for a generation.

Setting out his vision: Mr Cameron was dubbed the 'heir to Blair' as he used his conference speech to plant the Conservatives firmly in the centre ground of politics in a bid to lock Labour out of power for a generation

He said only the Tories could preside over a 'great British take-off' by marrying their economic discipline to a new crusade to end poverty and discrimination, and unlock social mobility.

'A Greater Britain doesn't just need a stronger economy, it needs a stronger society,' he said. 'And delivering this social reform is entirely fitting with the great history of the Conservative Party.'

Mr Cameron also launched a devastating attack on Labour leader Jeremy Corbyn, saying the Tories would never allow the Marxist throwback to 'inflict his security-threatening, terrorist sympathising, Britain-hating ideology on the country we love'.

But to the alarm of some Tory MPs, he paid only lip service to the EU referendum, and gave no clue as to how his government will tackle mass immigration.

Mr Cameron, who pledged to devote his time in office to tackling Britain's stalled social mobility, vowed to break down the 'brick wall of blocked opportunity' and end the situation where 'people are unable to rise from the bottom to the top, or even from the middle to the top, because of their background'.

Ukip leader Nigel Farage last night described the omission as a gift to his party, adding: 'Immigration and Europe – two of the biggest issues facing Britain today – and the Prime Minister has no clear strategy.'

Immigration and Europe – two of the biggest issues facing Britain today – and the Prime Minister has no clear strategy Ukip leader Nigel Farage

Some Tory MPs also voiced dismay. Peter Bone said: 'It is a strange omission because this is the biggest issue on the doorstep.'

The socially liberal tone of the speech recalled Mr Cameron's modernising pitch for the Tory leadership in 2005, with former Tory MP Louise Mensch hailing the Prime Minister as 'the heir to Blair'.

His audacious land grab for the political centre-ground also alarmed Labour moderates dismayed by the hard-Left views of their new leader.

Mark Ferguson, who helped run Liz Kendall's leadership campaign, said: 'As someone who cares passionately about Labour getting back into power to change the country, that Cameron speech was terrifying.'

Philip Collins, Tony Blair's former speechwriter, said: 'The contrast with last week (when Mr Corbyn spoke) is so deeply embarrassing I just want to cry.'