Around 40 terror plots have been foiled in the last 10 years in the UK, Home Secretary Theresa May has said.
Mrs May confirmed that the Government was expecting more British fatalities after a deadly attack on a Tunisian beach resort left at least 15 Britons dead.
Speaking to the BBC's Andrew Marr Show about the threat facing the UK, the Home Secretary said: "Yes, a number of plots have been stopped.
"Over the last ten years it's estimated that something like 40 plots have been disrupted here in the UK."
She said the security services have had to cope with a more "diverse" threat from extremists since the London bombings in 2005, including the possibility of lone wolf attacks.
Home Secretary Theresa May has defended plans to seize illegal workers' wages, saying radical action was "only fair" to British workers.
It was revealed today that police will be enabled to seize the wages of illegal workers as proceeds of crime under new proposals set to be included in next week's Queen's Speech.
Speaking to ITV's Good Morning Britain, Mrs May said: "I think it's only fair to working people, to people who are out there working hard and paying their taxes, that we do deal with people who are here illegally, who have no right to be here in the UK and should be leaving the UK."
Mrs May said the Tories' general election win would enable stronger action on immigration, but refused to comment on whether new figures released today would show an increase in migration.
The Home Secretary received her customary frosty welcome at her annual address to the Police Federation today, but if looks could kill, its chairman Steve White would not be long for this world.
The PFEW chair's jokes at her expense met with applause from the audience, and a murderous look from Ms May, who went on to promise further deep cuts to the police.
The Home Secretary is to launch a major independent review into police crime and performance targets.
She wants to "bring transparency to where, how and why targets are being used, and analyse the impact of targets on police officers’ ability to fight crime".
She said: "Information is critical to management and scrutiny. But there is a world of difference between the proper use of data to manage performance and the improper use of arbitrary targets.
"A police force [was] allegedly so intent on meeting Home Office targets about car theft and burglary that it ignored hundreds of young girls being abused in Rotherham and Sheffield."
The Home Secretary has warned of further cuts to police funding in the UK, telling the Police Federation that "delivering more with less can be challenging and difficult".
However, she rubbished reports "that we'll be 'forced to adopt a paramilitary style' of policing in Britain".
She told rank-and-file officers: "I have to tell you that this kind of scaremongering does nobody any good - it doesn't serve you, it doesn't serve the officers you represent, and it doesn't serve the public."
The Home Secretary has told the annual Police Federation conference that they need to stop scaremongering over their complaints about spending cuts.
In a speech, Theresa May said: "For your sake and the thousands of police officers that work so hard each day, this crying wolf has to stop."
She also said that more savings would have to be made in police budgets, saying reform "needs to go much deeper".
Pointing to the Independent Crime Survey, she added that crime had fallen by as much as 25% in England and Wales, despite the cuts already made.
Her comments met with frosty reception on Twitter, with many officers criticising her words.
Theresa May is set to announce new government plans to end the problem of people with mental health issues being detained in police cells.Read the full story ›
The Government is "very conscious" of the need to maintain free speech in its plans to tackle radicalisation, Home Secretary Theresa May has said.
Prime Minister David Cameron will today outline plans to include a new counter-extremism bill in his Queen's Speech, and will say the UK has been a "passively tolerant society" for too long.
Mrs May told Good Morning Britain that action needed to be taken against those who "seek to divide us" with "hatred and intolerance".
She denied the suggestion the measures could harm free speech, saying: "This is an area where we do have to be careful about how we draft the legislation to make sure it does cover what we want it to cover and still enables free speech to take place."
She added: "We’re very conscious to still maintain that value of free speech."
Theresa May will remain the Conservative Home Secretary.
I am glad to announce that Theresa May will remain as Home Secretary.
Home Secretary Theresa May is in difficult territory with the new counter-terrorism policy unveiled today.
We have heard how girls from moderate Muslim families in East London seem to have become radicalised to travel on to Syria and that is the sort of activity that Theresa May is trying to bring in these measures to intercept. She is trying to do deal with things that stop short of terrorism, but fall under the term extremism and that is always going to be a matter of definition.
Now May has really upset some quite moderate Muslim groups with some of the things she has been proposing. Some of them are perplexed with what Sharia Law has to do with this so these are very deep and sensitive waters into which she is stepping.