Not exactly true. While not as common as in the US, where only Andy Griffith doesn't carry a weapon (other than his deadly sense of bemused tolerance), the arming of police officers has been spreading in the UK for some 15 years. Admittedly, we've been to the UK only once (so far), but you see lots of "Bobbies" with sidearms. They've traded in the cool hats, too. Now they wear regular police hats with a checkerboard band.
(For those joining us late, this is the continuation of a series that began a few months ago with installment 1. I was inspired to get back to it by Kerry and her caffeine posting)