Google: 'Zero tolerance' on child sexual abuse imagery

The search engine Google has defended its policy on restricting online pornography, after a government adviser said it should do more.

It comes after a court heard pictures of child abuse were on the laptop of April Jones's murderer Mark Bridger.

Google spokesman Scott Rubin explained to the BBC's Mark Easton how it handled the issue, saying it took a "zero tolerance" approach to images of child sexual abuse.