As for Labour, their willingness to dump Brown - a man whom we must now regard as having laboured under a mental disability that should have excluded him from public office for his own well-being - will play badly in Labour heartlands where loyalty is singularly regarded. With a bit of luck, the entire run-up to the next election will have Labour's internal fighting in the background, and if we go to the polls again before Brown is replaced the country will be faced with the extraordinary prospect of voting for a party with an unknown leader. Nor can Labour's internal arrangements be used to postpone the next election until September - it will come as soon as Clegg's coalition collapses.
As for the suggestion that a Lib - Lab alliance would force through legislation to change our electoral system without a referendum, this is a deeply dishonourable course of action that betrays the sovereignty of the British people; it is the sort of thing we deprecate when done by African presidents consolidating power, and we certainly won't stand for it here. Neither, I think will a majority of MPs from all parties, for in such a Bill they will see the death of the political class.
At the moment Cameron is playing it exactly right. He may not be the world's most effective or charismatic leader, but he's blessed with a basic decency and sense of honour that is serving him well; he just has to be himself. Let Clegg and Mandelson sew up a deal, reap the ordure and suffer the ignominious collapse that will signal the next election.