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Stop Using Your Face or Thumb to Unlock Your Phone
(gizmodo.com)
This is a most excellent place for technology news and articles.
I live in the UK. A judge can compel you under Section 49 of the Regulation of Investigatory Powers Act 2000 to hand over any passwords for any devices or services they reasonably believe you have possession of the passwords for.
If you don't then you can be imprisoned for up to 2 years for normal crime or 5 years for crimes relating to national security or the production, possession or dissemination of CSAM