Online pornography to be blocked automatically, PM announces
22 July 2013 Last updated at 19:19 BST
Every household in the UK is to have pornography blocked by their internet provider unless they choose to receive it, David Cameron is to announce.
In addition, the prime minister will say possessing online pornography depicting rape will be illegal.
In a speech, Mr Cameron will warn that access to online pornography is "corroding childhood".
Rory Cellan-Jones reports.