Britain is planning a new internet surveillance law and big technology companies hate it. Facebook, Google, Twitter, Microsoft and Yahoo have joined forces to protest a number of provisions in legislation now passing through parliament. Dubbed a "snoopers' charter" by critics, the law would force internet service providers and phone companies to retain huge amounts of customer data that could be accessed by British security services, once a judge has reviewed their request. "No business should be compelled to generate and retain data that it does not ordinarily generate," the firms wrote in a submission to parliament made public this week. They said the law will undermine trust among their customers. Apple submitted its own complaint in December. It said the law would require tech firms to build back doors that would let both law enforcement and hackers snoop on customers' private conversations.