UK borrowing costs hit historic high as chancellor urges confidence

Britain’s borrowing costs have surged to their highest level in decades, yet Chancellor Rachel Reeves is pushing back hard against the gloom, insisting the country should hold its nerve and back the British economy.

Yields on 30-year UK government bonds climbed to around 5.4% this week — a level not seen since 1998 — while 10-year gilt yields hit 4.8%, rattling financial markets and raising fresh questions about the government’s fiscal headroom. The pound also slipped against the dollar, adding to an already uncomfortable picture for Downing Street.

Reeves doubles down on economic optimism

Standing in front of cameras on Wednesday, Reeves didn’t flinch. She acknowledged the market turbulence but argued that global factors, including rising bond yields across the United States and Europe, were driving much of the pressure. “I have confidence about Britain,” she said, stressing that the government’s growth agenda remained firmly on track.

But that confidence is being tested. Opposition politicians were quick to point out that the UK’s borrowing costs are now rising faster than many of its G7 peers, and that the chancellor’s own fiscal rules — which she made a centerpiece of October’s Budget — could be under serious strain if conditions don’t improve.

What’s actually driving the rise

Analysts are pointing to a cocktail of factors. Global bond markets have been selling off since late 2024, partly on expectations that central banks, including the Bank of England, will keep interest rates higher for longer. Sticky inflation, sluggish growth forecasts, and investor nerves about government debt levels worldwide have all piled on.

Still, the UK’s situation carries some home-grown complications. The government borrowed £11.2 billion in November alone, more than economists had expected. And the Office for Budget Responsibility’s forecasts already left Reeves with a razor-thin buffer of just £9.9 billion against her own spending rules — a margin that could evaporate quickly if gilt yields stay elevated.

Higher borrowing costs mean the government pays more to service its debt, squeezing the money available for public services or investment.

Markets watching for the next move

A Treasury spokesperson said officials are “monitoring market conditions closely” and remain committed to the fiscal rules set out in the autumn. That’s unlikely to satisfy critics who want more concrete reassurances.

So what happens next? The OBR is due to publish updated forecasts alongside a spring statement, expected in late March. Those numbers will be crucial. If the fiscal headroom has been wiped out, Reeves may face a very uncomfortable choice between raising taxes, cutting spending, or quietly loosening the rules she’s staked so much credibility on.

Financial markets will be watching every word. And with gilt yields still hovering near multi-decade highs, the chancellor’s confidence — however genuine — is going to need something more solid behind it than optimism alone.