The UK government's been pushing ISPs to enable adult content filters by default for quite some time, and today BT has fulfilled its commitments, joining other major providers like TalkTalk and Sky. A new tool from the telecoms outfit, cleverly named "BT Parental Controls," blocks unwelcome traffic at the router level -- BT has provided similar services before now, but this improved effort will be more conspicuous, especially for new broadband subscribers. When setting up their connection, customers will have the option to turn off filters that are otherwise switched on by default, just like Cameron wanted. Existing customers will be notified of the new controls next year, and if they're on board, will have three preset levels to choose from. Other features include a user-defined blacklist and timed filter periods, but as yet there's no "ignore Miley Cyrus" setting. Please BT, for the children.