David Cameron will announce plans to crack down on internet pornography today (July 22).

The British Prime Minister hopes to 'clean up the internet' and protect children from "often extreme" porn.

By the end of next year, all homes currently connected to the internet will be contacted by their Internet Service Providers (ISPs) and asked whether they would like family filters disabled. The filter will be automatically enabled for new customers setting up broadband accounts or switching providers unless a request is made to disable it.

A customer that does not respond to their ISP will have filters installed automatically, blocking all access to pornography.

Other measures being announced today include adult content filters on all new mobile phones, a ban on accessing adult content through public wi-fi and having media regulator Ofcom regulate progress.

The Prime Minister told the Daily Mail: "This is, quite simply, about how we protect our children and their innocence."

He continued: "Today, there is material freely available that is a 'direct danger to our children'."

Further steps include making it a criminal offence to possess pornography depicting rape - whether online or offline.

Attempting to reduce child pornography, search engines will begin blocking any results blacklisted by the Child Exploitation and Online Protection Centre (CEOP), with a warning appearing to those attempting to access images of children telling them they risk losing their jobs or access to their family.

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