We're waking up to a seismic moment in British politics - again.

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There'll be a lot of soul-searching in Labour in the next few days over how Gorton and Denton went from a safe Labour seat, to being pushed into third place by the Greens and Reform.

We know that unhappiness with Labour has been growing, nationally, for months.

But this shows just the extent that that unhappiness is having on people that Labour have, and should, always be able to rely on to back the red team.

Huge chunks of their key support is now haemorrhaging to the left, after months of focus on how votes have been collapsing on the right.

The PM and his team threw the book at it this week - with a string of briefings that only Labour could beat Reform, optimistic political expectation that it might be better than thought, and even a visit from the prime minister himself.

That's not something you'd expect unless their internal projections thought they had a slither of hope they could hang onto it.

All the Cabinet had been marched up to the area to door-knock and canvass at........

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