Tom Singleton:

US politicians, civil rights campaigners and the BBC are all calling for a High Court hearing about a data privacy row between Apple and the UK government to be held in public.

The tech giant is taking legal action after the Home Office demanded the right to access customer data protected by its Advanced Data Protection (ADP) programme.

Apple cannot access data stored in this way currently – but the UK government says it needs to be able to see it if there is a national security risk.

The BBC understands the matter will be considered at a closed hearing of the Investigatory Powers Tribunal at the High Court on Friday morning.