Plug Top Switch Saver

My cleaner has a habit of switching everything off when she is done on a Friday afternoon. The other weekend, as I was away until Monday, she decided to switch off the freezer! Monday found a freezer full of ruined (and quite smelly) food.
To stop this from happening again, I made this to physically stop her from switching off anything important (like my home server!).
This will fit a British 3 pin plug and I have included a right and left hand cover.
No more cleaner related mishaps (hopefully).