Apple has confirmed it has launched a new legal complaint against the UK government at a court that deals with objections to the use of covert surveillance powers. The tech giant has not told BBC News what the complaint relates to but the Financial Times, external has reported it is another challenge to a Home Office demand for so-called "backdoor" access to highly encrypted Apple user data. The row, which centres on the government's desire to be able to see material protected by an advanced data protection system - which currently even Apple itself cannot access - has been rumbling on since early 2025. Apple has meanwhile referred reporters to a statement given last year, after its initial challenge to the UK government's request. This said it was "gravely disappointed" it could still not offer its Advanced Data Protection feature to new UK users, following its decision to withdraw it in February 2025.