Main article: The precise number of websites blocked in the United Kingdom is unknown. Blocking techniques vary from one (ISP) to another with some sites or specific URLs blocked by some ISPs and not others.

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Websites and services are blocked using a combination of data feeds from private technology companies, government agencies, NGOs, court orders in conjunction with the service administrators who may or may not have the power to unblock, additionally block, appeal or recategorise blocked content. Contents • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Overview [ ] There are a number of different web blocking programmes in the UK. The high-profile default ISP filters and IWF filters have been referred to as a 'pornwall', 'porn filter', 'Hadrian's Firewall', 'Great Firewall of Britain' and the 'Great Firewall of Cameron'. Clap Your Hands Poem Download. However the programmes are usually referred to interchangeable or individually rather than collectively. Further information: ISP Default network blocking [ ] Internet customers in the UK are prohibited from accessing a range of web sites by default, because they have their Internet access filtered by their ISPs. The filtering program has applied to new ISP customers since the end of 2013, and has been extended to existing users on a rolling basis. A voluntary code of practice agreed by all four major ISPs means that customers have to 'opt out' of the ISP filtering to gain access to the blocked content.

However, the complex nature of the active monitoring systems means that users cannot usually opt out of the monitoring and re-routing of their data traffic, something which may render their data security vulnerable. The range of content blocked by ISPs can be varied over time. History [ ] The idea for default filtering originated from manifesto commitments concerning 'the commercialisation and sexualisation of childhood' given by the parties forming the government in 2010. This was followed by a review (the ) and a consultation by the (UKCCIS). Campaigning by MP and the newspaper resulted in significant public support for the idea of Internet filtering for the purposes of child protection. By 2013 there had already been considerable adoption of in-home filtering, with 43% of homes with children aged 5–15 having filters installed on their family computer.

Nevertheless, made it clear in July 2013 that his aim was to ensure that by the end of 2013 all ISPs would have a filtering system in place. As a result, three of the Big 4 major ISPs (, Sky and BT ) began applying default filtering to new customers in 2013 with the fourth major ISP,, doing so in February 2014. Default filtering of existing customers was implemented by all four major ISPs during 2014 with the aim of ensuring that the system applied to 95% of all households by the end of the year. TalkTalk already had content-control software available to comply with government requirements. Their HomeSafe internet filtering system was introduced in May 2011 as an opt-in product and was used for default filtering of new customers from March 2012. HomeSafe was praised by Cameron and is controlled and operated by the company.