It means Apple has the encryption keys to your backed-up data. So they can, in theory, access it, if the UK Gov demands that they do. That might never happen to

It means Apple has the encryption keys to your backed-up data. So they can, in theory, access it, if the UK Gov demands that they do. That might never happen to you, but with ADP it would have been impossible, because even Apple can't access it. See https://support.apple.com/en-us/102651 https://support.apple.com/en-us/102651