Parliament has launched a formal inquiry into child safety online - headed up by Claire Perry, the MP who infamously suggesting a UK-wide porn filter.
Perry last year proposed a film-style rating system for the internet, with adult content filtered out by ISPs. Adults wishing to see such content would have to opt-in with their broadband providers, although TalkTalk already offers an optional adult content filter.
The concept is now being formally investigated by parliament - and potentially extended. The inquiry will seek "to establish the arguments for and against network-level filtering of content that would require an 18 rating in other forms of media".
A spokesman for Perry said the inquiry is focusing on pornography, but the filter could also include other adult content, such as violent material. He noted TalkTalk's system allows parents to filter a variety of different types of content.
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