Twitter row victim Caroline Criado-Perez: 'I feel under siege'

A feminist campaigner who received threats of rape via the social networking site Twitter has spoken about how the experience has "consumed her life".

Caroline Criado-Perez reported the matter to police after receiving about 50 abusive tweets an hour for about 12 hours.

She spoke to BBC Newsnight about the reaction from the police and Twitter, and the impact the case has had on her life.