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There's a general consensus in politics today that that's it, that Gordon Brown is now secure in his post until the General Election.

I agree that's almost certainly true, but would say there's still a small chance - perhaps 5-10% - that Mr Brown might still go before the election.

There are a few Labour people - both pro and anti-Brown - who think it's still a possibility, though pretty small.

Their reasoning goes like this.

Yesterday illustrated very publicly just how little confidence Gordon Brown enjoys within his own Cabinet.

That was shown by how slowly Cabinet members came out to back him, and how lukewarm, or even tepid, the statements were when they finally did emerge.

Over the next few days it may sink in amongst Labour big-wigs just how dangerous it is for the party ahead of an election for this position to have become so publicly exposed - a prime minister who lacks the support even of his own Cabinet.

It's a far worse position than John Major was ever in.

It is just possible that a combination of Labour big beasts might get together and agree they collectively have to go and tell Mr Brown that the game is up.

That would mean three or four of the following people: Peter Mandelson, Jack Straw, Harriet Harman, Alistair Darling, Alan Johnson and David Miliband. Ed Balls would be a pretty unlikely extra bonus.

The first we'd get to hear of such an operation would be when Mr Brown announced he was resigning.

The big beasts might even agree amongst themselves who should take over - perhaps a dual arrangement with Mr Straw as acting PM, and Ms Harman as acting party leader.

There might even be time for a proper leadership election. Some reckon it could be done in 21-23 days, or up to eight weeks if union members were consulted, which would produce a new leader by mid-March.

Such a process might not tear the Labour Party apart; the debate could reinvigorate Labour, in the much same way the leadership election of 2005 did for the Conservative.

OK, it almost certainly won't happen. But it's a remote possibility.