The millions of people whose data it is selling on must now be informed, says the UK...
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Software designed to solve post-Brexit border friction is unlikely to be ready in time, they say.
If someone swipes on a potential match, they can now have a video chat with them.
The watchdog Ofcom says the move should encourage more people to switch and save money.
Many conservative Americans believe Facebook and Twitter are biased against them, despite denials.