An autistic man accused of hacking into US government computers can be extradited to the US from Britain to stand trial, a judge has ruled.

A government taskforce that reviewed the National Security Agency’s surveillance programme for four months is urging President Barack Obama to stop the agency’s bulk collection of telephone data and purge its massive inventory of millions of Americans’ calling records.

The US government “blew it” in the row over “spying” on users of social media, Facebook founder and chief executive Mark Zuckerberg has said.