Well at least several police forces willhttps://www.itv.com/news/anglia/2019-04-15/police-use-three-words-to-find-someones-exact-location/ …
It can be hard to describe your location in an emergency. 
what3words makes it simple. Make sure you’re prepared this summer by downloading the free what3words app. #Help999FindYoupic.twitter.com/Q1ohIIVWTg
-
-
This Tweet is unavailable.
-
- Show replies
-
-
-
Great system
#savinglivesThanks. Twitter will use this to make your timeline better. UndoUndo
-
-
-
Own up if you’ve ever used
@what3words to send your location to a friend and moved slighty to get a funnier location name? :)Thanks. Twitter will use this to make your timeline better. UndoUndo
-
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.