@jonty they're all over the life ring stations along the river near me. I can't think of anything worse than phoning up our local emergency services like:

Me: "Quick, someone's drowning"
999: "where are you sir?"
Me: "///agree.motoring.fixture"*
999: "I'm hanging up now, expect a fine for wasting our time"

* Yes, that's a real w3w address.