Threat of rape or violence 'not protected by Twitter'

Del Harvey, head of trust and safety at Twitter, has said that the company's policy is: "We don't want people to use our platform to do things that are illegal that's not something that we support."

"I think a lot of times people think that we stand on the whole 'Twitter is a platform for free speech - so anything goes' and that's just not the case," she said.

"We do have policies against a lot of harassment ... and a threat of rape or violence is not something that's protected by that sort of concept of anything goes."