I don't have the lock set on my watch, and before today it's never needed unlicking. Then today two things changed: I couldn't get it show me anything on the "usage" screen (it just went spinny thing), I decided to restart it to see if that helped. Then once it had restarted it asked my to unlock my phone to unlock the watch (and it had to be on my wrist). Now as I've not set the thing to lock I can only assume something's been sent from my work's Exchange servers (I have work email on my phone). It's no particular hassle as touch ID works ok, but I wonder if whatever security thing they've done is what's caused the usage thing to go wonky?