Skip to content
UK Economy

The 30-Year Gilt Broke 6% For The First Time Since 1998. Andy Haldane Says Britain Is 'Skating On Thin Ice'. Here Is Why The Picture Is Better Than It Looks - And What The Budget Must Do

On 1 October the UK 30-year gilt yield crossed 6% for the first time since 1998, and on 7 October it pushed to 6.036%, the highest since January of that year, as a global bond sell-off drove US borrowing costs to their highest since 2002. Former Bank of England chief economist Andy Haldane warned the country is 'skating on pretty thin ice in fiscal terms' and urged the government to show it can 'take the knife to public spending'. Lenders have pulled mortgages priced below 5%. Borrowing is running £8.1bn ahead of forecast, and the Chancellor's headroom is down to about £12bn three weeks before the 28 October Budget. All true - and yet much of the move is imported from America, Bank Rate is half its 1998 level, and sterling is firmer against the euro. Here is the British case for calm, and the Budget that would earn it.

AlchmAI Editorial12 min read

6.036%

Peak UK 30-year gilt yield on 7 October - the highest since January 1998, after first crossing 6% on 1 October

3.75%

Bank Rate today, against 7.25% when 30-year gilts last traded at 6% in 1998

~£12bn

Estimated fiscal headroom left before the 28 October Budget, roughly half of the spring figure

<5%

Mortgage rates lenders have been withdrawing as swap rates follow gilt yields higher

There are numbers that change the political weather, and a 6% handle on the 30-year gilt is one of them. The yield crossed 6% on 1 October for the first time since 1998, touching 6.029%, and on Tuesday 7 October it jumped 13 basis points to a peak of 6.036% - the highest since January 1998 - in a global sell-off that took equivalent US borrowing costs to their highest since 2002. The 10-year has traded around 5.5%. Three weeks before John Healey's first Budget, that is the backdrop against which every tax and spending decision will be judged.

Andy Haldane, the Bank of England's former chief economist, put the anxiety into words. 'The truth is we are skating on pretty thin ice in fiscal terms,' he said, 'and nothing would be worse both economically and politically than if the ice were to crack beneath our feet.' His prescription was blunt: the single most effective way to calm markets would be for the government to show it is 'able and willing to take the knife to public spending', and he warned that further tax rises risk undermining the investment that drives growth. The mortgage market is already moving - lenders have withdrawn products priced below 5% as the swap rates that price fixed mortgages follow gilts higher - and with borrowing running £8.1bn ahead of the Office for Budget Responsibility's path, estimates put the Chancellor's headroom at around £12bn.

What 6% Means For Households And Firms

  • Mortgages: fixed rates follow swap rates, which follow gilts. Sub-5% deals are disappearing; anyone remortgaging in the next six months should expect to pay more than they planned.
  • Pensions: higher long-term yields improve defined-benefit funding positions and annuity rates. For many retirees, this is better news than the headlines suggest.
  • Government: every sustained rise in yields feeds straight into debt-interest forecasts, which is why the headroom keeps shrinking before a single policy is announced.
  • Business: the cost of long-term capital is the highest in a generation. Projects that only worked at 3% money need re-examining; projects that make existing operations cheaper look relatively better.

What The Budget Should Do - A British View

We are a London firm and we will say it plainly: we think Britain's fundamentals are better than a 6% long bond implies, and that the Budget's job is to make that obvious. Haldane is right that credibility is the cheapest thing the Chancellor can buy. We would put the emphasis slightly differently.

  1. 01Show the plan, not just the cut. Markets punish uncertainty more than any single policy. A Budget that meets the fiscal rules with visible margin, on conservative OBR-scored assumptions, with no surprises, will narrow the UK-specific premium faster than headline-grabbing measures.
  2. 02Spend discipline where it buys time, investment where it buys growth. Haldane's 'knife' should fall on low-return current spending, not on the capital investment and productivity measures that are the only lasting answer to the debt arithmetic.
  3. 03Make productivity the growth story. Output per hour has barely moved since 2008. Allowances that treat software, automation and AI as plant and machinery would reward the investments that pay back inside the forecast period.
  4. 04Protect what works. Financial services is the UK's largest export and its regulators' flexible approach to AI and payments is a competitive advantage. A Budget that leans on the sector for revenue would spend that advantage to patch a hole.

“The gilt market is not pricing a British collapse. It is pricing a world where long-term money costs more, plus a modest premium for doubt about Britain's plan. The Budget can remove the doubt; it cannot remove the world.”

What Firms Should Do Before 28 October

The Bottom Line

The 30-year gilt's break above 6% - 6.036% at its peak on 7 October, the highest since January 1998 - together with Andy Haldane's 'thin ice' warning, sub-5% mortgages being withdrawn and roughly £12bn of headroom left, sets a hard backdrop for the 28 October Budget. But much of the move is imported from a US-led global bond sell-off, Bank Rate is half its 1998 level, and sterling is holding up against the euro: this is a global repricing with a British premium, not a British crisis. The Budget that reduces that premium is credible and conservative on the numbers, disciplined on low-return spending and bold on productivity. For firms, the planning case is dear money for longer and the response that works regardless is to take cost out of operations. That is the AI and workflow automation we deliver as an agency in London, and the gilt market is making the case for it.

References & Further Reading

UK EconomygiltsBudget 2026AI Agency UKAI Automation LondonWorkflow Automation Londonmortgages
Share Email
AI

AlchmAI Editorial

Research and analysis, London

The AlchmAI team writes about the markets, technology and regulation we work with every day. We build trading platforms, real-time charts and AI analysis tools for brokers, prop firms and fintech teams from our office in Mayfair, London. Every article lists its sources. Nothing we publish is investment advice.

This article is general information and commentary. It is not investment advice or a recommendation to buy or sell any investment. Important information

Keep reading

All articles