I added an Active Plug to my set up last night.
At first I plugged the multi socket extension that powers the TV, Amazon Fire Stick, Sky Now Box etc. into it with the idea of setting a schedule or program to turn them off when they're not needed.
I had forgotten, however that the Hive hub is is attached to that as well. Every time I turned it off the whole system went offline, which baffled me for a while.
It's working now and seems to be OK.
I can't control it with Alexa though as she (it?) is interpreting "Alexa, Hive turn off my plug" as "Alexa, hi turn off my plug."
It looks like I will have to wait for voice training to be released in the UK, or for the Echo to adapt itself automatically to my dulcet tones, before I can try that out without getting so frustrated I feel like throwing it out the window.
One nice minor touch in it (to end with a whimper) is a manual over-ride switch on the top. So now you know.