Should the government spend an extra £15bn on defence from 2026 to 2030?

What stands out is not that the chamber backed the extra £15bn for defence between 2026 and 2030, comfortably in the end, but who supplied that majority. The 35-64 age bands delivered the most emphatic support of any group, while the youngest cohort in the vote, the 16-24s, tipped the other way, a inversion of the demographic pattern that usually attends questions of tax-and-spend, where it is the young who favour bigger state outlays and the old who resist them.

That reversal is the sharpest clue in the data. Where younger voters often read new spending commitments as claims on their future taxes or as crowding out other priorities, here it was the older and middle-aged who were readiest to underwrite a rearmament programme, suggesting an instinct rooted less in generational self-interest than in a harder-edged view of security itself, one shaped by a world of resurgent state threats rather than the peace dividend their juniors have grown up with.

The vote lands squarely on Britain's long argument about the size and shape of the state: whether new money should chase growth, welfare or the NHS, or whether the deteriorating international picture, from Ukraine to wider NATO commitments, justifies diverting resources to the military first. That this settled so decisively for more defence spending, even as day-to-day budgets remain tight elsewhere, says something about where the chamber currently draws that line.

The floor's most respected voice for Yes framed the case narrowly around protection rather than projection, insisting the money should "protect our own, not to cause chaos in another land" — a formulation that squares hawkish spending with a distinctly non-interventionist instinct, and perhaps explains why support cut across age and gender so widely once the youngest sceptics are set aside.

A chamber that argues fiercely over almost everything else found, on this occasion, an unusually settled majority for arming up.