WhatsApp must be accessible to authorities, says Amber Rudd

Critics say home secretary's demand for access to encrypted messaging to thwart attacks is unrealistic and disproportionate

Amber Rudd has called for the police and intelligence agencies to be given access to WhatsApp and other encrypted messaging services to thwart future terror attacks, prompting opposition politicians and civil liberties groups to say her demand was unrealistic and disproportionate.

The home secretary said it was "completely unacceptable" that the government could not read messages protected by end-to-end encryption and said she had summoned leaders of technology companies to a meeting on Thursday 30 March to discuss what to do.