Surveillance of MPs: 'Constituents' privacy must be protected'
Three politicians are challenging the lawfulness of the intelligence services' bulk interception of electronic data at a hearing on Thursday.
Green Party politicians Caroline Lucas and Baroness Jenny Jones and former Respect MP George Galloway say MPs' communications are being intercepted.
Speaking to the BBC's Clive Coleman, Jenny Jones said the action was about protecting the privacy of the public, including constituents' communications.