I think it's still fair to say it's centrally controlled because the government introduced it as part of policy and sets the rules on what needs to be blocked.

I think it's still fair to say it's centrally controlled because the government introduced it as part of policy and sets the rules on what needs to be blocked. The fact ISPs find their own ways of complying doesn't change the fact this is government-driven. If this was ISP-led, you might find the market reflecting a plurality of option, with consumers having a choice. Instead, this is Government-led, with ISPs expected to fall into line: https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/225783/Connectivity_Content_and_Consumers_2013.pdf https://www.gov.uk/government/uploads/system/uploads/attachm... > Across the internet value chain, we expect industry – from retailers to device manufacturers – to ensure that all internet-enabled devices, whether a TV, games console or smart phone, are supplied with the tools to keep children safe as a standard feature > We expect the smaller ISPs to follow the lead being set by the larger providers. > And while Government looks to the industry to deliver, through the self-regulatory mechanisms already established under UKCCIS, we are clear that if momentum is not maintained, we will consider whether alternative regulatory powers can deliver a culture of universally-available, family-friendly internet access that is easy to use.