The head of M15 has warned that terrorists could be 'slipping' through the net because of the spy agencies inability to monitor modern means of communications.
Jonathan Evans, the Director General of MI5, said it was increasingly difficult to be confident that terrorists were being fully watched.
His comments come amid a row over government plans to allow the police, security and intelligence agencies the power to monitor every email, phone call and web visit, the Telegraph reports.
The Coalition has been divided over the plans with tension between Home Secretary, Theresa May and Nick Clegg, the deputy Prime Minister, who believe the proposals go too far.
According to the report, the parliamentary Intelligence and Security Committee (ISC) supported the proposals, but said the government must do more to convince public of the need for them.
Measures in the draft Communications Bill will allow the Government to order communications companies to keep every detail of their customers' activities for up to a year.
Ministers said that it is necessary to allow the police and intelligence agencies to stay ahead of terrorists and criminals who are able to exploit all forms of modern communications, such as social media sites, the report said.
The authorities will be able to see with whom people are in contact and when, but not the content of any communication, it added. (ANI)