Government plans to give the police and security services new powers to monitor all emails, web visits and phone calls must undergo a "fundamental rethink", Nick Clegg has warned.
The Deputy Prime Minister said ministers needed to "go back to the drawing board" after a committee of MPs and peers found measures supposed to enable investigators to keep pace with technological developments went far further than necessary and amounted to overkill.
The committee, set up to examine the draft Communications Bill, accused the Government of using "fanciful and misleading" figures to support its case for the legislation.
Mr Clegg said ministers must take account of the committee's findings and that the Bill - dubbed a "snooper's charter" by critics - could not proceed in its current form.
More top news
George Osborne's fiscal rules leave him little room for error as he tries to balance the books, the Institute for Fiscal Studies says.
Dillon, a happy, healthy eight-year-old from Coventry, has microcephaly. His mother Sarah writes what it's like to deal with the condition.
An industry has grown up around the Fab Four's legacy that supports 2,335 jobs and has potential for further growth.