A looming leadership challenge to Prime Minister Keir Starmer is casting a long shadow over UK assets, pushing the pound to its weakest level in a month.
The British pound held near a one-month low of 1.3528 on Thursday as reports of an imminent leadership challenge to Prime Minister Keir Starmer fueled political uncertainty, complicating the UK's economic outlook even as data showed surprising strength.
"The war in Iran is set to slow growth, lower typical household incomes by £550 this year and increase government borrowing by £16bn by the end of the decade," said Simon Pittaway, a senior economist at the Resolution Foundation thinktank, highlighting the fragile backdrop.
The currency's slide occurred despite the Office for National Statistics reporting the economy expanded 0.6 percent in the first quarter of 2026, outpacing all other G7 nations. The pound remains under pressure as traders weigh the positive economic data against the prospect of a divisive and protracted leadership contest within the ruling Labour Party.
Heightened political instability could lead to a sustained sell-off of the pound, with a formal leadership contest likely increasing volatility in UK equities and government bonds. Such turmoil would complicate the Bank of England's monetary policy decisions and could deter foreign investment at a critical juncture for the economy.
The political drama escalated as Health Secretary Wes Streeting is reportedly preparing to resign and challenge Sir Keir Starmer for the party leadership. The move threatens to overshadow the government's agenda and has already led to the resignation of four ministers. Despite the turmoil, the Prime Minister's spokesman insisted Starmer retains "full confidence" in Streeting. The challenge comes as more than 86 Labour MPs have publicly called for Starmer to stand down, creating the most significant crisis of his premiership. Chancellor Rachel Reeves warned against the infighting, stating, "Now is not the time to put our economic stability at risk."
The political crisis creates a confusing picture for investors, contrasting sharply with recent economic news. The 0.6 percent GDP growth in the first three months of the year defied economists' expectations of a contraction. The services sector was a primary driver, with computer programming and advertising performing well. However, some economists urge caution. Rob Wood, chief UK economist at Pantheon Macroeconomics, suggested the "GDP strength is exaggerated by front-running of potential supply disruptions," indicating the underlying trend may be weaker than the headline number suggests. This political uncertainty now becomes the dominant factor for UK assets, overriding the positive surprise in growth figures.
This article is for informational purposes only and does not constitute investment advice.
