Internet firms have condemned the government’s “Big Brother” surveillance plans as an “unwarranted” intrusion into people’s privacy…The criticism, contained in a private submission to the Home Office, threatens to derail the £2 billion project… [T]he submission — by the London Internet Exchange, which represents more than 330 firms including BT, Virgin and Carphone Warehouse — said… “[T]he volume of data the government now proposes [we] should collect and retain will be unprecedented, as is the overall level of intrusion into the privacy of citizenry.”… The rebuke is the latest blow to the plans to allow police, the intelligence services and GCHQ…to monitor all web communications.