MPs’ and peers’ private communications are not protected from interception by the so-called Wilson doctrine that was widely thought to provide special privileges for parliamentarians, according to a court ruling. […]
Downing Street described the Wilson doctrine first expressed in 1966 as a political statement, without legal force, and pointed out that the intelligence agencies might be monitoring an individual who was in contact with an MP. […]
Matthew Rice, of Privacy International, said: “Today’s tribunal ruling that MPs should have no special protection from having their communications intercepted, confirms what Privacy International have been arguing for a long time: mass surveillance affects us all.”
“Anyone who has exchanged emails with their MP about a sensitive matter should be aware that government snoopers may have access to this personal information. From charity workers to politicians, lawyers to refugees, it is of great concern that the UK’s surveillance regime cannot function without interfering with everyone’s right to privacy, regardless of their need for professional confidentiality.”
http://www.theguardian.com/world/2015/oct/14/gchq-monitor-communications-mps-peers-tribunal-wilson-doctrine