The British pound is on course for its most significant weekly decline in 18 months, largely driven by speculation surrounding a potential leadership challenge to Keir Starmer from Manchester Mayor Andy Burnham. Amidst rising political tensions and economic concerns, sterling has weakened considerably, marking a tumultuous period for UK markets as investors react to the unpredictable political landscape.
Sterling’s Decline: A Reaction to Political Shifts
As of Friday, the pound had depreciated by approximately three cents, or 2.2%, to $1.332—its lowest value in five weeks. This marks the steepest weekly drop against the dollar since the electoral victory of Donald Trump in November 2024. The currency’s decline reflects growing apprehension in the financial markets regarding Starmer’s leadership amidst mounting pressures following recent local elections.
Market analysts attribute the fall to the announcement by Burnham that he intends to contest the parliamentary seat for Makerfield. Kathleen Brooks, research director at XTB, stated, “The pound is weakening this morning after a sharp drop on Thursday, when Andy Burnham threw his hat into the ring. This is a sign that Burnham is the least market-friendly of all the candidates.” In contrast, the resignation of Wes Streeting did not elicit a similar market response.
Rising Government Borrowing Costs
The uncertainty surrounding Labour’s leadership is also reflected in increased government borrowing costs, which have surged as investors sell off UK sovereign debt. Yields on UK 10-year bonds have climbed to 5.18%, reaching their highest levels since 2008, while yields on 30-year bonds have risen to 5.85%. This trend comes amid concerns over rising oil prices, which have reignited inflation fears.
The bond market is reacting to apprehensions that a Burnham premiership could lead to a relaxation of fiscal discipline and higher government borrowing aimed at increased public spending. Investors are wary, recalling Burnham’s previous remarks about the UK being “in hock to the bond markets” and trapped in a “low-growth doom-loop.” Although Burnham has moderated his stance in recent interviews, the apprehensions remain palpable.
Political Landscape and Market Implications
Neil Wilson, an investor strategist at Saxo UK, emphasised that markets are likely to react unfavourably to a left-leaning Labour leadership under Burnham, given his known fiscal perspectives. He noted, “Ultimately the bond market is likely to impose fiscal discipline, but it can get messy before that happens.” The fragility of the UK’s fiscal position is further exacerbated by geopolitical tensions, particularly regarding crucial oil supply routes.
Mark Dowding from RBC BlueBay Asset Management warned that Starmer’s tenure at 10 Downing Street may be drawing to a close. “Against this backdrop, UK financial assets and sterling seem likely to be subjected to an elevated political risk premium for an extended period,” he stated.
Future Challenges for Burnham
While speculation around Burnham’s leadership ambitions intensifies, it is important to note that he faces a challenging path ahead. To mount a credible challenge to Starmer, he must first secure a victory in a byelection for the Makerfield constituency, where the local Reform UK party performed well and the Green Party could also pose a significant threat. The seat is currently held by Josh Simons, who has a slim majority of just over 5,000 votes.
Analysts like Bill Diviney from ABN Amro predict that the ongoing uncertainty surrounding fiscal policy will likely lead to volatility in gilt markets. However, he also highlights Burnham’s popularity, noting, “He is by far the most popular among the general public, and in YouGov polling, he is actually the only major politician in the UK with a net positive approval rating.” A stabilising factor for Burnham could be if Rachel Reeves continues as Chancellor, signalling a commitment to fiscal continuity.
Why it Matters
The current turmoil in the UK political landscape poses significant implications for the economy and financial markets. The decline of the pound and rising borrowing costs reflect the anxiety investors feel about potential shifts in fiscal policy under a new Labour leadership. As uncertainty looms over the government’s direction, the economic ramifications could be profound, affecting everything from consumer confidence to international investment. The outcome of Burnham’s political ambitions may ultimately shape not just the Labour Party’s future but the UK’s economic stability as a whole.