"Until recently, the security services have gone to great lengths not to
disclose their operational capabilities. If the bad guys know how their
communications can be monitored, they’ll look for other ways of
exchanging information. So it’s something of a surprise to see how open
the agencies have now become."
Banksy’s mural depicting agents monitoring a phone box near GCHQ in
Cheltenham. The spy agency now admits it can take control of a phone or
computer.
Photograph: Jules Annan/Barcroft
