In a dramatic turn of events, the UK faces soaring government borrowing costs and a weakening pound as political tensions mount with the announcement of Andy Burnham’s candidacy for a parliamentary by-election. This latest development has rattled financial markets, prompting fears of increased public borrowing under a potential Burnham-led government.
Borrowing Costs Hit 18-Year High
The UK’s government borrowing costs have surged to their highest levels in 18 years, with the yield on 10-year bonds climbing above 5.14%—a figure not seen since 2008. This spike has outpaced similar movements in other European nations, signalling heightened concerns that Burnham’s leadership could lead to a significant increase in government debt.
Kathleen Brooks, research director at XTB, noted that the pound has taken a hit as well, falling 0.3% against the dollar to approximately $1.337. This decline follows a sharper drop late Thursday after Burnham’s announcement. “The market sees Burnham as the least friendly candidate, especially compared to the impact of Wes Streeting’s resignation,” Brooks stated, highlighting a 1.5% drop in the pound this week alone.
Political Uncertainty Drives Market Reactions
As political instability continues to dominate the headlines, long-term borrowing costs have also spiked, with 30-year gilt yields reaching a staggering 5.82%. Investors are increasingly concerned that Burnham’s leadership could exacerbate the UK’s already high levels of public borrowing. In a candid interview with the New Statesman last year, Burnham advocated for moving beyond reliance on bond markets, a sentiment that has resonated unfavourably with investors.

Russ Mould, investment director at AJ Bell, emphasised that even though Burnham’s seat in parliament isn’t guaranteed, his remarks have contributed to rising borrowing costs and a declining pound. “Any process involving Burnham is likely to be lengthy and disruptive, further amplifying uncertainty surrounding UK politics,” he observed.
Global Factors Amplifying Concerns
The situation is compounded by international tensions, particularly the ongoing conflict in Iran, which has sparked fears of inflation driven by surging energy prices. Brent crude oil prices soared above $109 a barrel on Friday morning, up from $105.72 the previous day, before settling around $108.10 by midday BST. These developments have led to broader market declines, with the FTSE 100 index down 1.7% on Friday, mirroring similar declines across European markets.
Brooks reiterated the key elements influencing the pound and government borrowing costs: the potential shift in government ideology and the overall turmoil in leadership. “The current political landscape is chaotic, and there’s evidence that foreign investors are pulling back from the gilt market,” she explained.
Burnham’s Parliamentary Bid
Burnham, currently serving as the mayor of Greater Manchester, has confirmed his intention to run for a parliamentary seat following the announcement that MP Josh Simons would step down. “We will change Labour for the better and make it a party you can believe in again,” Burnham proclaimed, asserting his commitment to restoring faith in politics. However, his path to the leadership remains fraught with challenges, from local party selection to a potentially contentious by-election battle against Reform UK.

Why it Matters
The ramifications of this political upheaval are profound, as rising borrowing costs and a declining pound could spell economic trouble for the UK. Investors are closely monitoring these developments, as a shift to the left under Burnham could lead to increased deficits and further instability. The outcomes of Burnham’s political ambitions may not only reshape Labour but also have significant implications for the UK economy and its standing in global markets. The ongoing leadership drama underscores the fragility of the current political climate and its potential to influence financial stability in the coming months.