Tessa is an expert on privacy law and free speech issues, the author of the spiked-report Restraint or Revelation? Free speech and privacy in a confessional age( 2002) and Disclosure: media freedom and the privacy debate after Diana (1997) and, is a Visiting Fellow at the Department of Journalism, University of Lincoln. She is a regular guest contributor to CNN and has appeared as a guest on BBC News, Five News, Sky News and BBC Radio 4.