Media playback is unsupported on your device

Legal highs clampdown 'failing' says Centre for Social Justice

1 September 2013 Last updated at 08:39 BST

Government efforts to clamp down on the sale of substances known as legal highs are failing, according to an independent think-tank.

The Centre for Social Justice, a group set up by the Conservative MP Iain Duncan Smith, says the UK is now one of the leading hubs for buying and selling the products on the internet.

John Ironmonger reports.

Copyright © 2015 BBC. The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.