Forbes only half says
Forbes only half says it's Stuxnet; the article body backpedals a bit.
The other half of their point is that Edf Electricity Distribution has been sold to a pair of Hong Kong companies, and the sale has just completed. Edf Electricity Distribution apparently covers London and much of the south east. Maybe they're worried about 2012 and don't want to be associated with what is going to happen...
Nice to know UK plc's essential utilities are in safe hands and not subject to the arbitrary ravages of the free market and in particular of (very) foreign companies not a million miles from those nasty Commies in China who now do most of the UK's manufacturing.