[MARKET ANALYSIS] UK Budget, 2026: No fireworks from Chancellor Healey, major reform kicked to 2027+, DMO skewed away from the long-end once again

• Chancellor Healey’s speech was as expected overall. Focused on pre-announced/touted measures with particular emphasis on the cost of living, he stayed clear of the major decisions, with those kicked into 2027 or beyond on welfare, pending reviews that are due in November and then the 2027 Spending Review. The major points were also as expected or favourable, with the Bank Surcharge at 6% (prev. 3%) vs a historic 8%, and only for 15 months from January; supporting the sector. Rolls-Royce and defence names generally got a boost on the defence investment plan confirmation and additional measures. Again, other points largely in-line with expectations heading into the release.
• Overall, the headroom narrowed to GBP 14.5bln at the 3rd yr assessment, from GBP 23.6bln in March 2026 or GBP 21.7bln from the last budget. While a cut, this is a reasonable level; however, the OBR gives it just a 56% chance of holding, down from 59%, even though the shorter horizon means it is mechanically easier to be met. As usual, the biggest risk to the headroom is fuel duty, as if the measure stays frozen then headroom would be cut to GBP 10.2bln.
• Forecasts point to robust enough GDP growth, though the 50bps cut to the 2027 view to 1.0% was an unwelcome score from the OBR. On inflation, 2027 was lifted to 3.4%; again, unwelcome, but not surprising given the current backdrop. The OBR’s economy forecast assumes Bank Rate rises to just over 4.25% by mid-2027 and just over 4.5% by the end of the horizon, with the fiscal forecast using rates c. 25bps higher on average, in line with market pricing of c. 100bps of tightening.
• The DMO remit was increased to GBP 250.6bln of gross Gilt issuance, incrementally above expectations of GBP 249.6bln and vs a GBP 246.2bln prior. In terms of the breakdown, the skew was away from the long-end to the short-end via auctions and the medium-bracket via syndications in particular. An outcome that, while widely expected, lifted Gilts by just under 20 ticks to a fresh session high. However, this then pared on the full OBR document being released, the referenced commentary, and focus on some of the housing costs outside the borrowing numbers.
• Overall, a budget that has alleviated some fears heading into it. However, further tests are on the horizon, namely the welfare-related reviews, 2027 spending review, the expected first BoE hike, EU-UK summit and continued cost of living pressures. Additionally, speculation around a potential early election remains.

Budgets whose risk sat in the remit rather than the tax take have become the familiar UK pattern: the market story runs through DMO supply composition, not the fiscal arithmetic, and a skew away from long-end issuance has reliably been the gilt-positive outcome given how thin long-duration demand has proven since the liability-driven episodes of recent years. The sequence here follows that template: initial duration relief on the remit breakdown, then partial retracement once the full fiscal document and its caveats are digested, a two-stage reaction that has repeated across recent UK fiscal events. The bank surcharge set below its historic peak and the defence confirmation are sector stories, not macro ones; the macro content sits in the headroom, which past OBR probability readings of this sort have framed as hostage to fuel duty freezes and spending reviews rather than to anything announced on the day. Worth noting is the OBR assumption of Bank Rate rising through the horizon, since fiscal events that shift the inflation forecast feed directly into gilt pricing via the front end and the expected first hike rather than through term premium alone. The deferred items, welfare reviews, the spending review, and any change in the issuance remit at the next revision, are where the precedent says the real repricing tends to occur, as it did in prior episodes where the headline budget passed quietly but the follow-on arithmetic did not.