Chinese firm Huawei controls net filter praised by PM

The pornography filtering system praised by David Cameron is controlled by the controversial Chinese company Huawei, the BBC has learned. UK-based employees at the firm are able to decide which sites TalkTalk's net filtering service blocks. Politicians in both the UK and US have raised concerns about alleged close ties between Huawei and the Chinese government. The company says the worries are without foundation and prejudiced.