Stock Markets June 22, 2026 03:20 AM

UK Stocks Drift Lower as Upset Over Starmer’s Future Overshadows Geopolitical Progress

Markets weigh fresh questions about the prime minister against easing tensions in U.S.-Iran talks and softer oil prices

By Derek Hwang
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British equity benchmarks fell modestly on Monday as renewed speculation over Prime Minister Keir Starmer’s prospects muted earlier gains tied to progress in U.S.-Iran negotiations. The FTSE 100 slipped 0.07% after trading higher, while risk assets were influenced by signs of diplomatic progress on the Strait of Hormuz and a small retreat in oil prices. Currency markets and gilt positioning were also affected by commentary from strategists and politicians.

UK Stocks Drift Lower as Upset Over Starmer’s Future Overshadows Geopolitical Progress
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Key Points

  • FTSE 100 slipped 0.07% after trading higher earlier, while Germany's DAX rose 0.09% and France's CAC 40 edged down 0.09%; sterling fell 0.17% to 1.3211.
  • Reports that Prime Minister Keir Starmer is considering resignation have refocused markets on UK political risk, with Jefferies saying such a move "should make the transition smooth" for Andy Burnham but warning about fiscal credibility depending on the new chancellor.
  • Progress in U.S.-Iran talks in Switzerland, described as showing "encouraging progress" by mediators, helped ease the oil risk premium, pushing WTI to $75.43 and Brent to $78.84, while gold prices moved higher.

British equities closed lower in light trading on Monday as fresh uncertainty surrounding Prime Minister Keir Starmer counterbalanced hopes that recent U.S.-Iran negotiations could reduce geopolitical risk in the Gulf.

Reports indicating the prime minister is considering resignation prompted market attention on succession dynamics. Jefferies strategist Mohit Kumar said the potential departure "should make the transition smooth" for Andy Burnham.

Over the weekend, former U.S. President Donald Trump posted on Truth Social that Starmer "will resign as Prime Minister of The United Kingdom," attributing the development to what he described as failures on "immigration and energy."

At 03:21 ET (07:21 GMT) the FTSE 100 was down 0.07% after having been higher earlier in the session. Germany's DAX gained 0.09% while France's CAC 40 inched lower by 0.09%. Sterling eased 0.17% against the dollar to 1.3211.

Andreas Lipkow, chief market analyst at CMC Markets, said that investors earlier in the day seemed to "place greater weight on developments in US-Iran negotiations than on domestic political noise. That suggests markets remain primarily focused on the outlook for energy prices and global risk sentiment rather than near-term uncertainty in Westminster."

Still, the modest dip in the FTSE underlines that the balance between geopolitical developments and domestic political uncertainty remains fragile. Lipkow flagged the absence so far of a "meaningful risk premium in domestic UK assets," noting that investors appear prepared to look past speculation about the prime minister's future while geopolitical progress continues to support market sentiment.

He warned, though, that "any setback in negotiations would likely have a greater impact on sentiment than domestic political developments in the near term."

Jefferies said markets are now watching the choice of chancellor closely once a new prime minister is installed, adding that "if the new chancellor is not credible, it would raise concerns over deficits and borrowing." While Burnham has pledged to respect fiscal rules, Kumar observed that "it is not obvious where the money for any additional spending will come from," noting further that more tax rises could be counterproductive and that efficiency savings are unlikely to materialise.

Reflecting this caution, Jefferies said it has "stayed away from the long end of the gilt curve, holds steepener positions, and remains underweight sterling," and that it expects "further volatility in the UK long end over the coming days."

On the geopolitical front, U.S. and Iranian negotiators met for a second day of direct talks in Switzerland on Monday with the aim of cementing a permanent end to hostilities within a 60-day framework. Mediators from Qatar and Pakistan described "encouraging progress," pointing to the establishment of a new High-Level Committee and a communication line intended to secure safe passage through the Strait of Hormuz.

The talks were briefly unsettled on Sunday after comments from Donald Trump angered Iran's negotiating team, but both sides returned to negotiations. Jefferies said it remains "optimistic that a deal will be reached," while acknowledging the 60-day truce period could ultimately be extended.

Oil prices eased on the session amid hopes for unimpeded shipping through the Hormuz chokepoint. WTI crude fell 0.55% to $75.43, and Brent crude dropped 1.51% to $78.84. Jefferies noted that as long as oil holds around the $75 level, "risk sentiment should remain well-supported," and the firm said it has been adding risk to its portfolio on the assumption that the truce endures.

Gold bucked the broader risk-on tone by moving higher. Spot gold rose 0.93% to $4,198.55, while gold futures gained 1.06% to $4,217.05.


UK corporate round-up

  • Easyjet rejected a third takeover approach from U.S. investment firm Castlelake that valued the airline at 625 pence per share.
  • Ocado Group said chief executive Tim Steiner and the board are continuing long-term succession planning and engaging with potential candidates, after reports that Vonage chief executive Niklas Heuveldop had been approached for the role.
  • Babcock International reported a 19% fall in annual underlying operating profit to 0293.3 million, which included a \u00a3140 million charge on its Type 31 frigate programme for the Royal Navy.

These corporate updates fed into the modest domestic market moves as investors balanced company-specific news against broader macro and geopolitical developments.


What to watch next

Markets will likely remain sensitive to any change in the trajectory of U.S.-Iran talks, as negotiators work to formalise a framework intended to halt hostilities. Domestically, attention will be on political developments in Westminster, particularly the selection of a chancellor should a transition in leadership occur, and any resulting implications for gilt yields and sterling.

Risks

  • A breakdown or setback in U.S.-Iran negotiations would likely have a greater negative impact on market sentiment than current domestic UK political developments - this risk affects energy and broader risk assets.
  • If a new UK chancellor is perceived as not credible, concerns over deficits and borrowing could increase, pressuring gilts and sterling - this is a fiscal and sovereign bond market risk.
  • Further uncertainty around the prime minister's future could inject volatility into domestic UK assets, particularly long-dated gilts where positioning is already cautious.

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