Mark Zuckerberg apologises for 'major breach of trust' in Cambridge Analytica scandal

Mark Zuckerberg has said it was a mistake to rely on Cambridge Analytica (CA) to delete tens of millions of Facebook users' data as he apologised for the "major breach of trust".

The site's founder said the political consultancy had provided formal assurances that information harvested from 50 million profiles had been destroyed after Facebook first learned of the breach in 2015.