David Cameron's warning over child abuse images DAVID Cameron has warned internet firms they face legal controls unless they do more to block child abuse images found using their search engines. The message for internet giants such as Google, Bing and Yahoo! came ahead of a major speech to child safety campaigners by the Prime Minister today. Mr Cameron will tell web companies that he will not accept any excuses about "vile images of abuse" that he says exist in the "darkest corners of the internet." The Prime Minister will pledge to hand police and the Child Exploitation and Online Protection Centre (Ceop) "all the powers they need" to crack down on any online abuse. He will also promise to ensure that online videos are subject to the same rules as those sold in sex shops, as part of a package of reforms to make the internet safer for children. Mr Cameron wants search engines to block any results being displayed through a "blacklist" of terms compiled by Ceop. The government has been involved in negotiations with technology firms over the best way to crack down on child abuse, and the main service providers have agreed to introduce "splash pages" which tell people if they are attempting to view illegal images. But the Prime Minister will call on firms to go further, saying: "These warning pages should also tell those who've landed on it that they face consequences, such as losing their job, their family, even access to their children if they continue and vitally, they should direct them to the charity campaign Stop It Now, which can help them change their behaviour anonymously and in complete confidence." Mr Cameron will warn firms that "legislative options" could be used to force them to comply if they have not made progress on a blacklist by October. He will say: "I want to talk about the internet. The impact it is having on the innocence of our children. How online pornography is corroding childhood. And how, in the darkest corners of the internet, there are things going on that are a direct danger to our children, and that must be stamped out. There are some searches which are so abhorrent and where there can be no doubt whatsoever about the sick and malevolent intent of the searcher that there should be no search results returned at all. Mr Cameron will reject attempts by the internet giants to claim that the task is beyond their capability as he sets the October deadline. Saying the government will do "whatever it takes" to tackle the problem, Mr Cameron will urge the firms to hold "hackathons" - events where software experts collaborate - to produce results. I have a very clear message for Google, Bing, Yahoo! and the rest. You have a duty to act on this - and it is a moral duty. Possession of online pornography depicting rape is already illegal in Scotland, but Mr Cameron will pledge to close a loophole that means it is not an offence south of the Border. He will promise stronger powers to investigate the hidden internet for Ceop, which polices and tracks internet child abuse in all parts of the UK. The body will be handed powers to investigate behind paywalls and examine secretive file-sharing networks. Mr Cameron, who has faced criticism over cuts to Ceop's funding, will insist that the centre's experts and police will be given the powers needed to keep pace with technological changes on the net. He will also use his speech to tell internet providers to use their "greatest brains to work on this" and to devote expertise to blocking images of child abuse being downloaded. He will say: "If there are technical obstacles to acting on this, don't just stand by and say nothing can be done; use your great brains to help overcome them. You're the people who have worked out how to map almost every inch of the Earth from space, who have developed algorithms that make sense of vast quantities of information. You're the people who take pride in doing what they say can't be done. You hold hackathons for people to solve impossible internet conundrums. Well - hold a hackathon for child safety. Set your greatest brains to work on this. You are not separate from our society, you are part of our society, and you must play a responsible role in it. This is quite simply about obliterating this disgusting material from the net - and we will do whatever it takes. Pressure to act against online child porn has increased in recent months following several high-profile murder trials. Mark Bridger, who killed April Jones, and Stuart Hazell, murderer of Tia Sharp, were both found to have accessed child and violent pornography and some experts argue there is a clear link between their obsessions and their actions. After a summit meeting last month, the four main UK internet service providers agreed to put up an extra £1 million funding for the Internet Watch Foundation to help it work with Ceop. Internet giant Google insisted it had a "zero tolerance attitude" to its search engines being used to download child abuse images. A spokesman said: "We recently donated $5 million [£3.28m] to help combat this problem and are committed to continuing the dialogue with the government. We have a zero tolerance attitude to child sexual abuse imagery. Whenever we discover it, we respond quickly to remove and report it. New scheme to help adult survivors of child abuse Tia and April parents call for drive on child porn