By Emaan Nazar Shah
A minister quits in protest because the Treasury won’t fund the armed forces properly. Six weeks later, he’s running the Treasury. That’s what happened when Prime Minister Andy Burnham, Britain’s seventh PM in ten years, named John Healey his Chancellor of the Exchequer – the same Healey who had resigned as defence secretary in June, telling colleagues the Treasury had been “unwilling” to find the money to keep the country safe.
Markets didn’t wait for a Budget speech to react. On the first trading day after the appointment, Babcock International rose 6.8%, QinetiQ gained 4.5%, and BAE Systems added 3.1% – well ahead of a European defence index up only about 1% that same day. In the same session, gilt yields hit fresh two-month highs and sterling gave up its early gains, as bond traders asked the question equity traders skipped: how does this actually get paid for?
It’s an unusually clean case of political conviction being read directly as a trading signal – one that cheered defence investors and unnerved bondholders in the very same afternoon.
Why the market reacted this way
The appointment wrong-footed Westminster; Healey hadn’t been seen as a serious contender for the Treasury, and putting a minister who’d just resigned over spending levels in charge of setting them was, on paper, an odd choice. Under Keir Starmer, Healey’s fight with the Treasury over defence money ended in his departure. Under Burnham, the same fight appears to have propelled him into the building he was arguing with.
Investors read it as conviction plus competence, a combination markets tend to reward. Healey had served as a junior Treasury minister in the 2000s and sat in cabinet alongside Burnham under Tony Blair, and AJ Bell’s Dan Coatsworth called him “a safe pair of hands”, someone with fiscal credibility as well as a defence agenda. Equities were effectively betting his convictions would eventually get funded; gilts and sterling stayed focused on the constraints standing in the way.
The numbers behind the story
Strip out the personnel drama and the argument comes down to a handful of figures. The government’s Defence Investment Plan commits £298 billion over four years to 2029-30, lifting core defence spending to 2.7% of GDP by 2027–28 – the highest share in three decades.
As defence secretary, Healey had pushed for more: 3% of GDP by 2030, a notably more ambitious timeline than the government’s official position of 3% “by 2034 at the latest, economic conditions allowing”. That gap, 2030 versus 2034 is really what’s being priced now: does Healey’s personal timetable become policy now that he controls the purse, or does the more cautious official line hold? Hitting 3% four years earlier than planned would mean finding roughly £10 billion a year sooner than currently budgeted.
That number lines up uncomfortably with the other £10 billion in this story: Burnham’s fiscal headroom sits at around £10 billion, roughly where it stood a year ago – a level that’s historically left UK governments exposed to bond-market scares. Defence isn’t the only claimant on that space either; housing, welfare reform and growth spending are all competing for the same narrow room.
Bull case vs. bear case
Bullish: The biggest contractors look like the most direct beneficiaries. BAE’s order backlog hit a record £83.6 billion, spanning submarines, combat vehicles and fighter jets. Rolls-Royce’s defence division carries a £17.5 billion backlog with order cover near 90% for the rest of 2026, while its Power Systems arm hit a record £7.3 billion backlog of its own. Citi flagged Babcock and QinetiQ as the biggest potential beneficiaries, since 60–65% of their sales come from UK defence spending versus just 25–30% for BAE, meaning they’re more directly exposed to a UK-specific budget uplift. Further down the market, analysts point to smaller names like Filtronic, Avon Technologies and SRT Marine Systems as offering more asymmetric upside: a single meaningful Ministry of Defence contract moves the needle far more for a small-cap than it ever could for BAE.
Cautious: Burnham’s narrow headroom means tax rises are likely to be back on the table at the autumn Budget rather than free spending “more for defence” may ultimately mean “more from taxpayers.” Valuations aren’t starting from a low base either: Europe’s defence index has roughly tripled since the Ukraine war began, including a 54% gain in 2025 alone, so Healey’s appointment added a fresh leg onto an already-extended rally rather than kicking one off from depressed prices. And gilt yields at two-month highs raise the government’s own borrowing costs in real time, making large permanent spending increases harder to sustain without clearer decisions on tax or offsetting cuts elsewhere.
Bottom line
The “Healey premium” priced into UK defence stocks only holds up if signalling turns into funded, contracted programmes that actually show up in order books – not a rhetorical commitment that gets trimmed once it meets the Budget, a pattern British governments have followed before. For now, markets have priced in a minister’s conviction. Whether the government can afford to match it, and on what timetable, is still an open question, one the autumn Budget should start to answer.
The views expressed in this article are the author’s own and may not reflect the opinions of The St Andrews Economist.
Image Credit: euro-sd.com