Revealed: Islamist extremists have penetrated the heart of Britain

Islamist extremists have infiltrated Government and key public utilities to pass sensitive information to terrorists, the security services have warned. Counter-terrorism officials say “insiders” or their associates are almost certainly working “undetected” in sensitive posts and are actively supporting the activities of extremists.

The development is detailed in intelligence reports circulated to the Home Office, police and Whitehall officials. The London Underground, Gatwick airport and BT are cited as examples of organisations which have been targeted by individuals linked to terrorists. Officials say the idea of “penetrating the enemy is pervasive” for Islamist extremists. It is understood a number of suspected jihadists working in Government departments and the public services are being monitored by the security services.

Details of the threat emerged months after the Daily Mail revealed fears that Scotland Yard has been infiltrated by individuals linked to extremist groups including Al Qaeda. Several police officers and civilian staff are being monitored amid claims they are long-term sleepers trying to gain sensitive information of use to terrorists.

This is London, 12 February 2008