CHAOS!

Tom Watson, Brown's chief political henchman, has stood down from his post according to Sky. The report, on this day of total chaos for the government, offers no reason for his shock decision which means there must be speculation he was fired.

So it seems Guido might be right after all: there is an agent provocateur at the heart of Brown's government and, after a spate of embarrassing leaks and briefings against Brown, Watson would appear to have failed his master for the last time.

As government collapses go, this one is spectacular.