Cameron admits he fears his own children will stumble across online porn: I worry every time they grab hold of the iPad, he says... so NOW will he act? *.

David Cameron yesterday admitted he fears online porn could harm his children. The Prime Minister says he worries when any of his threechildren ‘grab hold of the iPad’ because they risk seeing obscene images. ‘The world has changed so fundamentally with the internetthat we’ve got some real threats there to our children and also from this appalling scourge of child pornography,’ he said. ‘We’ve got to take a lot of action.’ Mr Cameron is now pledging to‘put the heat’ on web firms, making them do more to remove illegal child abuse images and protect children from legal porn. At a summit tomorrow, ministers and charities will demand action from internet service providers. TalkTalk and BT announced at the weekend that customers trying to view child sex abusesites would be confronted witha pop-up warning. The ‘splash pages’ are aimed at deterring paedophiles such as Mark Bridger, who killed five-year-old April Jones after accessing sickening online material. Maria Miller, who is hosting the summit, is expected to askother operators to follow suit. The Culture Secretary said: ‘These firms have an enormous responsibility to make sure our children are protected in the best way possible. Tackling this problemis not easy when technology changes and adapts at such afast pace. ‘But I am determined to do all Ican – and to encourage industry to do all it can – to put an end to it. ‘I will say that things need to change, that enough is enough, and when I do my children will be at the forefront of my mind, as they always are.’ Mr Cameron said there was nodoubt that internet companies needed to do more on online pornography – the subject of a Daily Mail campaign. On the issue of child abuse images, he told Sky News: ‘I’mnot satisfied that internet companies do enough to help take them down. ‘That’s why we’re having thisround table in government with them to really put the heat on, [to ask them to] workwith the police, work with us so we can get these images off the internet and prosecutethose who put them there. ‘As a parent I worry, and I know people watching this programme worry massively, about what our children can get to see when they grab hold of our iPad or log on to the internet. ‘There we need to make more progress of this issue of explaining to everybody that we want to have better filters that parents can switch on to stop access to certain sites and material.’ Mr Cameron hailed the fact that web companies have pledged to introduce clean public wi-fi, so youngsters willnot be at risk of seeing porn at a Starbucks. His remarks came as a poll found a majority of the public were in favour of making search engines such as Google put automatic filters onadult sites. Fifty-four per cent believed the firms should no longer automatically provide links when people search for pornography sites. The YouGov survey of almost 1,900 people also found that women were strongly in favour of curbs on web porn.