The British Prime Minister has warned that his country cannot come under the control of the "terrorist-sympathising" Jeremy Corbyn in a speech putting national security at its heart.
David Cameron told the Conservative conference it was his "duty as Prime Minister to keep people safe" and rounded on the Labour leader over his objections to renewing the nuclear deterrent and views on terrorism.
In a highly personal attack on Mr Corbyn, he said: "We cannot let that man inflict his security-threatening, terrorist-sympathising, Britain-hating ideology on the country we love."
It came in a keynote address in which he promised that it was his "duty" to keep Britain safe and that it was time to "really confront extremism".
Mr Cameron said that the "shadow of extremism was hanging over every single one of us."
And he added: "When I read what some young people born and brought up in this country are doing, it makes me feel sick to my stomach."
As part of his attempt to tackle the problem he vowed to shut down Muslim Madrasas that preach hate to children in a leadership speech in which he promised to tackle extremism and keep the nation safe.
Mr Cameron said the Government had to stop children's heads being "filled with poison and their hearts with hate".
He said there were children who spend several hours each day at Madrasas where they were "being beaten" and "taught they shouldn't mix with people of other religions".
According to an IPPR report in 2011 there were 250,000 Muslim children attending roughly 2,000 madrasas in the UK. However, they are not regulated by Ofsted.
The Prime Minister said the "religious institutions" would need to be registered to be inspected and added: "And be in no doubt: if you are teaching intolerance, we will shut you down."
A spokesman for Mr Corbyn said: "The fact that David Cameron used his speech to make personal attacks on Jeremy Corbyn are a sure sign that he is rattled by the re-energisation of the Labour Party.
"With cuts to tax credits and a continued failure on housing, his claim that the Conservatives are the party of working people is being exposed."
In a 50-minute speech in Manchester, Mr Cameron attempted to set out what he hoped would be his legacy.
He made pledges of an "all-out assault on poverty" and promises on "opportunity" and "equality" and he promised a "crusade" on house-building.
He said the Government would work towards military intervention in Syria saying: "Some think we can contract that out to America. We shouldn't. We must play our part, too."
And he said that the UK would retain a nuclear deterrent and added: "Because our independent nuclear deterrent is our ultimate insurance policy - this Government will order four new Trident submarines."
Mr Cameron, who is meeting the German chancellor Angela Merkel on Friday, promised to deliver on reforming Britain's deal with the EU.
He told the conference he had "no romantic attachment to the European Union and its institutions" and would "fight hard in this renegotiation - so that we can get a better deal and the best of both worlds".
The Prime Minister again claimed the centre ground, saying the Conservatives were the true party of working people and that Labour lost the election because "they didn't understand the people who make up our country".
He said that most people "aren't obsessive, arguing at the extremes of the debate" and that "Britain and Twitter are not the same thing".
At a conference that has been marked by the "beauty contest" of leadership hopefuls, Mr Cameron also praised two of the front runners, George Osborne and Boris Johnson, for their work as Chancellor and London Mayor.
However, there was no mention for Home Secretary Theresa May, who caused controversy with her speech on immigration at the conference on Tuesday.
All three made speeches which were a clear pitch for the leadership, prompting former leader Iain Duncan Smith to comment that senior Conservatives should be putting running the country before their leadership ambitions.
