Nevertheless, the ISP Andrews and Arnold does not censor any of its Internet connection all its broadband packages guarantee a 12-month notice should it start to censor any of its traffic. They were all mandating filters be enabled as default for new customers, but overall take-up figures were low, with BT (5%), Sky (8%) and Virgin (4%).The figure was higher for Talk Talk (36%) as there had already been significant take-up of its system during the preceding three years.One known method is ISP scraping DNS of domains subject to blocking orders to produce a list of IPs to block.
The idea for default filtering originated from manifesto commitments concerning "the commercialisation and sexualisation of childhood" given by the parties forming the Cameron–Clegg coalition government in 2010.
The initial legal status of ISP web blocking was voluntary, although there were a number of attempts to introduce legislation to move it onto a mandatory footing.
David Cameron first announced such legislation in July 2013 and no Government legislation to this effect occurred during the 2010-15 Parliament.
In May 2015, a leaked Council of the European Union document on the topic of net neutrality suggested users would have to opt into blocks, rather than opt out as per the current UK government's plans.
John Carr of the UK Council for Child Internet Safety said of the proposals: "a major plank of the UK’s approach to online child protection will be destroyed at a stroke".