Rachel Reeves wanted her Spring Statement to be boring. She explicitly designed it that way — a “single fiscal event” strategy that reserves major policy announcements for the Autumn Budget, leaving the spring update as a dry recitation of OBR numbers. No new taxes. No headline policy shifts. Just steadiness.

The problem is that the numbers themselves told a story the Chancellor couldn’t control. The OBR now forecasts growth of just 1.1% in 2026, down from the 1.4% it predicted in November. Inflation will fall faster than expected — to 2.3% this year — but that projection was finalised before the Iran war sent energy prices into orbit. The real inflation picture is almost certainly worse than the official forecast suggests.

The Defence Dilemma

The biggest policy signal was on defence. Reeves announced what she called “the biggest uplift in defence spending since the Cold War,” a commitment driven by the Iran conflict, the ongoing war in Ukraine, and growing pressure from NATO allies. The spending is necessary. But it creates an immediate fiscal problem: where does the money come from?

Reeves insisted she remains on track to meet her main borrowing target by 2029/30 with £23.6 billion of headroom, up from £21.7 billion in the autumn. But fiscal headroom is not the same as fiscal comfort. The OBR’s projections assume the Iran war will be short, that energy prices will normalise, and that the global economy will recover in 2027. If any of those assumptions prove wrong — and war assumptions frequently do — the headroom evaporates.

The Borrowing Reduction

The Chancellor pointed to a reduction in borrowing of nearly £18 billion compared to the Autumn Budget as evidence of fiscal discipline. This is true in a narrow accounting sense. But much of the improvement comes from lower-than-expected debt interest payments (a consequence of falling inflation expectations before the Iran shock) rather than from spending restraint or revenue growth.

In other words, Reeves got lucky with the timing of the forecast. The next set of numbers, which will have to incorporate the full impact of $100+ oil on the UK economy, will not be so forgiving.

What She Didn't Say

The most revealing aspect of the Spring Statement was what Reeves avoided. She didn’t address the impact of the Iran war on UK energy bills. She didn’t explain how defence spending increases will be funded without either cutting other departments or raising taxes. She didn’t acknowledge that the OBR’s growth forecast may already be outdated.

The Institute for Government noted that the Statement was designed to “project steadiness rather than launch new policy initiatives.” That’s a polite way of saying the Chancellor is hoping the problems go away before she has to deal with them. It’s a gamble. And with oil above $100, a war in the Middle East, and a global economy in shock, it’s not a particularly safe one.

The Tightrope

Reeves is walking a fiscal tightrope that gets thinner with every week the Iran conflict continues. She has committed to spending more on defence, maintained her borrowing rules, and refused to raise taxes. Something, eventually, will have to give. The Spring Statement was her attempt to delay that reckoning. The autumn may not be so kind.