Re: The maths don't add up...
"if a brief blip COULD have cost you 10% of the month's supply, why do you not have generators to stop that happening?"
They do. Not every incident is preventable.
$orkplace has generators and other kit in place to prevent blips getting through. It's worked around 2500 times in the last 12 months - and failed once (which was the fault of the maintenance team hitting the wrong button). People criticize the fail but neglect the success record.
Yes, UK power really is that dirty.