An MI5 agent was allegedly recruited by a terrorist organisation in Syria . He was then sent back to Britain in a plot to launch an attack against MI5 . An undercover operation was planned to detect and foil any similar plots . Scotland intelligence has arrested the man and he remains in protective custody .
An MI5 agent was allegedly recruited by a terrorist mastermind in Syria . He was then sent back to Britain in a plot to launch an attack against MI5 . An undercover operation was launched to try and track any similar plots . Scotland Yard has arrested the man and he remains in police custody .