Intelligence experts and organised crime specialists will join forces to tackle child abuse images on the ‘dark net’, David Cameron has said. The prime minister said a joint GCHQ and National Crime Agency unit would hunt online paedophiles with the same ‘effort’ used to track terrorists. Speaking at a London summit, he said online child exploitation existed on an ‘almost industrial scale’ worldwide. He also unveiled a law to stop adults sending children ‘sexual’ messages. Labour said it had suggested the same law six weeks ago and the government had said it was ‘not necessary’. Mr Cameron said the new unit was part of a drive to remove millions of ‘sickening and depraved’ images from the internet. The term ‘dark net’ refers to parts of the internet that are hidden and can be hard to access without special software, and Downing Street said the new unit would be able to analyse huge volumes of images.