A law forcing firms to hand details to police identifying who was using a computer or mobile phone at a given time is to be outlined by Theresa May.
The home secretary said the measure would improve national security.
As part of the Counter-Terrorism and Security Bill, providers would have to retain data linking devices to users.
But campaigners warned it could see the revival of the so-called “snoopers’ charter” – a previous attempt to bring in wide-ranging web monitoring powers…
