Apple is going to completely disable end-to-end encryption for iCloud accounts in the UK. https://www.macstories.net/linked/apple-to-eliminate-advanced-data-protection-for-icloud-accounts-in-the-uk/
While this may be the best course of action the company can take to effectively demonstrate the UK government's resolute willingness to build a backdoor into some of the world's largest user bases, it is also setting up a major precedent.
Apple is now effectively putting in place a process that can be re-applied in the future whenever a government requires it by law.