Police in the UK have the power to seize mobile devices from any traveler entering the country, and can retain their personal data for as long as they see fit, according to a report from the Telegraph.
They might have the power to, but they don't exercise it[1]. Also, this is about phone as in physical device; it doesn't grant them the right to access the (encrypted) data, does it?
1. Fun fact: the Queen has the power to execute anyone at will.
