There are by-elections, and then there are by-elections. In 1962, Orpington sent the Liberals surging from the margins and began the long, slow undermining of Harold Macmillan. In 1967, Hamilton gave the SNP its first Westminster seat and planted a flag which, decades on, reshaped a nation.
And in January 1965, Leyton humiliated Harold Wilson's brand new government when his own Foreign Secretary, parachuted into a safe seat, lost to a Conservative by 205 votes. One commentator called it "the most astonishing election result since the war".
These contests matter not merely as snapshots of public mood. They are hinge points. Moments when history, sensing its opportunity, changes gear and does not change back.
Makerfield is one of those moments. Feel it.
It is the first time in over sixty years that a parliamentary vacancy has been deliberately created to provide a seat for a figure outside Parliament, the last occasion being that very Leyton catastrophe of 1965. And so history, that most sardonic of ironists, repeats itself.
A Labour movement rattled, leaderless and haemorrhaging support, clears the decks for a preferred candidate and hopes the electorate will play along. Then, in Leyton, they didn't. The question now is whether the good people of Makerfield will prove any more obliging.
Josh Simons has resigned as MP so that Andy Burnham can "fight to re-enter Parliament". The choreography is exquisite in its contempt.
A man elected by real people, in a real constituency in the real Wigan, stands aside so that the party machine can insert its preferred Prime Minister-in-waiting.
The voters of Makerfield did not choose Burnham. They chose Simons. They are now being instructed to feel grateful for the privilege of choosing again, this time correctly.
Because of this, and Reform must make this absolutely clear from the first canvass to the last, it is not merely a by-election about Andy Burnham's career trajectory. It is a referendum on this diabolical Labour Government and everything it has done to the British people since July 2024. The ballots going into that box in Makerfield are not just votes. They are verdicts.
Let us rehearse the charge sheet, because it is long, and because the people of Wigan know every item on it in their bones.
A Government that promised change and delivered managed decline. That person who walked into office on a landslide of misplaced hope and, within months, began stripping the winter fuel payment from elderly people who had worked their whole lives.
One in three children and a quarter of adults are now living in poverty in Britain, with deprivation levels at their highest this century.
A Government that then turned to the disabled, those least able to fight back, and cut their benefits in a welfare bill so punitive that its own Work and Pensions Select Committee called it "discriminatory" and warned it would push disabled people into poverty, yet every one of its Labour members voted for it anyway.A Government that froze and cut and salved its conscience with press releases while working people made impossible choices between heat and food.
Keir Starmer told the country he would make it feel different. That is true; he has made it feel worse. And the country has noticed.
The verdict began arriving last week. In Wigan and Leigh, two former mining towns at the very heart of what we are discussing, Reform won 24 of 25 seats.
These are working people, the children and grandchildren of miners and mill workers, people whose families voted Labour as a matter of inheritance and identity, telling the party of Attlee and Bevan to go to hell.
In the eight Makerfield wards that went to the polls last week, Reform secured 50.4 per cent of the vote. Labour managed 22.7 per cent. That is not a swing. That is a rout.
This is the most important political fight in decades - and it will be enormous fun | And now, into this landscape of smouldering Labour wreckage, comes the ‘great’ Andy Burnham, King of the North, self-styled saviour of his party, graciously descending from his Greater Manchester throne to rescue the very people his party has been grinding down for years.
The personality clash alone is worth the price of admission. Burnham, King of Mercia, against Farage of Essex. There is something almost medieval about it, two warlords contesting a march, and the people of the march knowing perfectly well which one of them has actually been making their lives worse.
Let no one mistake Burnham for the solution. He is the continuation of the problem wearing a more personable face. He sat in the Cabinet under Blair and Brown.
He has been part of the Labour establishment that has taken these communities for granted across decades. The argument that he alone can contain the Reform surge is the argument of a machine that has run out of ideas and reached for a personality instead. It is the politics of the photo opportunity dressed up as renewal.
When Farage says Reform will throw everything at this contest, I know from long experience that he means it with every fibre.
Forget the kitchen sink, he will go next door and throw that one too. Farage said simply: "We look forward to the contest." That is a masterpiece of studied understatement from a man who has spent thirty years being underestimated.
The machine is beginning to purr into life. My WhatsApps are pinging like an ICU monitor. People are already arriving in Makerfield.
From Bedford, from Glasgow, from Yorkshire, from Wales, buses are being hired, and printers are already churning out leaflets. It is like a Saxon king calling out the fyrd.
And what a fyrd Reform can now produce, battle-hardened from Clacton, from Rochester, from Runcorn, from the ground war of these local elections.
Gorton and Denton were the most instructive models, a mountain climbed not quite to the summit, but the results there and in last week's Wigan wards give us both the data and the template.
At Millbank, decisions are being made. Options studied. The candidate will matter. The message must be relentless, and it must be honest: this is not about stopping Burnham's coronation, though that is the delicious box-office framing that will draw in the cameras and the commentators.
This is about giving a diabolical Labour Government no escape, no narrative of renewal, no convenient reset. Every vote for Reform in Makerfield is a vote that says: you will not be allowed to paper over what you have done to us by shuffling the faces at the front.
The polling baseline is stark: on the most recent test of opinion in this geography, Reform starts as clear favourites. Burnham's formidable personal vote is the great unknown; he won his mayoral election with 63.4 per cent, and no model yet captures what that means in a parliamentary contest where he is the candidate. This will almost certainly become a tactical voting election. The Greens will press their claims.
If Burnham wins, the Labour machine will declare the Reform surge contained, the leadership contest begins on their terms, and Starmer limps on long enough to do more damage. The coronation proceeds. The suffering continues.
If Reform wins, the coronation is cancelled. The tired old order sits in Westminster, bereft, diminished and exposed, as its empire leaches away ward by ward, seat by seat. No story of renewal is available to them. The reckoning cannot be deferred.
Those are the stakes. That is why this matters beyond the considerable pleasure of the contest itself. The people of Makerfield have already spoken once, last week, in the only language this government seems capable of understanding. Now they get to speak again, in a language the whole country will hear.
It will be the hardest of work. It will also be the most important fight of this political moment. And it will, I confess without apology, be enormous fun.