Media playback is unsupported on your device

Child porn: 'real deterrent needed'

22 July 2013 Last updated at 10:33 BST

Every household in the UK is to have pornography blocked by their internet provider, unless they choose to receive it.

The plans, to be introduced over the next two years, will be announced by David Cameron later.

Jim Gamble, the former head of the Child Exploitation and Online Protection Centre said he welcomed any initiative to tackle pornography, but said much more effort should be put into targeting paedophiles directly. "Attack the root cause: invest with new money, real investment into child protection teams, victim support, and policing on the ground.

"And let's create a real deterrent, not a pop-up that paedophiles will laugh at, but an actual deterrent where we see paedophiles being led from the police car to the court room. That will prevent them from going online much more than a pop-up," he said.

The prime minister's special adviser on the matter, Conservative MP Claire Perry, explained what would happen if someone tried to access and offensive image under the plans.

First broadcast on BBC Radio 4's Today programme on Monday 22 July 2013.