I suspect that Brown will be hurling his slippers at the TV screen because he is rather depending on national debt being an abstract concept, something ending in -illion that people don't quite understand. Sky is telling its viewers straight that this recession (and this government) is running up the mother of all bills that we (and our children) will have to pay.
I'd quite like them to alternate this as they do in the US with "your family share" - ie, the full government debt (not just this year's deficit), divided by the number of families in Britain. It's something like £70,000, a hidden second mortgage. But with at least five more years of rising national debt, there's plenty of time to play around with the format.