'Missing' Plutonium...

Apparently, Sellafield has 'lost' enough Plutonium to make seven Nuclear bombs. (They don't say what size bomb.)

But it's alright though because it's only a 'paper' loss. In other words their records say they should have it but in practice it's not there.

Hello?? Isn't that an actual loss? If the petty cash tally says you should have fifty quid in the box but inside there is only forty, surely the answer is that someone is nicking it?!