Court says mass collection of emails illegal, UK not worried
The Luxembourg court ruled that a "general and indiscriminate retention" of data was illegal but said that communication data could be retained when used "solely for the purpose of fighting serious crime".
The legal challenge was originally brought by UK Labour's deputy leader Tom Watson and then-backbencher David Davis, who stepped back from the campaign when he was made Brexit Secretary by May.
The ruling could mean further contests to the government's Investigatory Powers Act, which requires communication companies to retain data for 12 months and came into force in November.
The ECJ decision follows a preliminary verdict confirming the ruling in July and the case will return to London's Court of Appeal.
However, the ruling could merely be notional since Britain is leaving the European Union and will no longer be under the jurisdiction of the European Court of Justice. ■