UK Borrowing Costs Reach Highest Since 2008
UK government borrowing costs rose to their highest level since 2008 on Friday, as financial markets anticipate up to three interest rate increases this year amid concerns over the Iran conflict. The yield on 10-year government bonds climbed to levels not seen since the global financial crisis, driven by a sell-off in UK government bonds.
This market reaction followed the Bank of England’s decision on Thursday to maintain the base interest rate at 3.75% while signaling a potential future increase. By Friday, market expectations had shifted to pricing in as many as three rate hikes in 2026.
Higher yields on government bonds increase the cost of servicing the national debt, posing challenges for the Chancellor, Jeremy Reeves. The 10-year gilt yield surpassed 5% by mid-afternoon, marking the highest point since mid-2008 during the global financial crisis.
Stock Markets React to Middle East Tensions
Simultaneously, stock markets in both the UK and the US declined as investors processed reports of increased US military deployment to the Middle East. Axios reported on Friday that the US is considering plans to occupy or blockade Iran’s Strait of Hormuz to pressure Tehran into reopening nuclear talks.
The FTSE 100 index dropped as much as 1.5%, erasing all gains made in 2026 before recovering slightly to close down 1.3%. On Wall Street, the S&P 500 and Nasdaq indices each fell approximately 1%.
Market Commentary on Bond Yields
Following the rise in bond yields, Kathleen Brooks, research director at trading platform XTB, commented on the situation:
“The bond vigilantes are after the UK once more.”
She cautioned that investors would closely watch any government plans involving financial support for energy consumers.
“The fact that UK debt is selling off more than anywhere else should be a warning sign to this government: be careful about making promises around energy subsidies, as the gilt market may not have the bandwidth for any more handouts.”
Public Finances Data and Deficit Increase
The gilt sell-off coincided with public finance data released on Friday morning, which revealed an unexpected monthly deficit of £14.3 billion in February, an increase of £2.2 billion compared to the same month last year.
The Office for National Statistics (ONS) noted that the data was influenced by the timing of government debt repayments, with some payments occurring in February instead of January.
Concurrently, the ONS revised January’s surplus upward to £31.9 billion from the previously reported £30.4 billion, supported by increased tax receipts.
Government Borrowing and Fiscal Strategy
Since Labour assumed power in 2024, Chancellor Jeremy Reeves has deliberately increased borrowing to fund investment projects while raising taxes significantly to reduce the current deficit, which reflects borrowing for day-to-day government spending.
The latest figures indicate progress in reducing the current budget deficit, which fell by 21.1% in the 11 months to February compared to the previous year, standing at £62.1 billion.
Total borrowing over the same period was £125.9 billion, suggesting it may fall below the Office for Budget Responsibility’s annual forecast of £138.3 billion.
Concerns Over Economic Impact of Middle East Conflict
Despite these positive indicators, analysts expressed concern that rising energy prices, inflation, and interest rates linked to the Middle East conflict could threaten the £23 billion fiscal headroom the Chancellor maintained in last autumn’s budget.
Martin Beck, chief economist at consultancy WPI Strategy, stated:
“That the deficit numbers are broadly on track will be a welcome development for a government keen to preserve fiscal credibility at a time of unwelcome geopolitical and economic turbulence. But that turbulence means the recent fiscal numbers may prove a poor guide to what comes next.”
Nabil Taleb, economist at PwC, added:
“Interest rate cuts are inevitably deferred, inflation now looks set to pick up again, and growth remains subdued.
That combination risks putting renewed pressure on borrowing and leaves the public finances exposed, underlining just how quickly the fiscal picture can shift.”
Government Response to Economic Challenges
The government has emphasized that its tax increases and inflation control measures, including plans to reduce energy bills starting in April, have strengthened the economy’s resilience.
James Murray, Chief Secretary to the Treasury, commented:
“We have the right economic plan. Because of the choices we made before the conflict in the Middle East began, we are better prepared for a more volatile world.”
