United Kingdom, Sept. 3 -- The UK government may have pushed Apple to give it access to a broader range of customer data than previously disclosed, according to a new court filing.

The dispute centres on Advanced Data Protection, an Apple service that uses end-to-end encryption to secure user information in iCloud so only account holders - not even Apple - can view it.

In February it emerged the Home Office had demanded access to encrypted content stored under ADP, using powers granted by the Investigatory Powers Act.

A document filed with the Investigatory Powers Tribunal now suggests the request was not limited to ADP but could have extended to other Apple data.

Apple, founded in 1976 and currently headed by Tim Cook, introduced ADP...