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UK shares fall as political uncertainty, Middle East concerns hit sentiment

Published by Global Banking & Finance Review

Posted on May 12, 2026

2 min read

· Last updated: May 12, 2026

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UK Shares Drop as Political Uncertainty and Middle East Conflict Weigh on Markets

Market Reaction to Political and Geopolitical Events

Political Uncertainty Surrounding Prime Minister Keir Starmer

May 12 (Reuters) - UK shares slipped on Tuesday as investors weighed domestic political uncertainty, with Prime Minister Keir Starmer defying calls to step down, alongside renewed concerns over tensions in the Middle East.

The blue-chip FTSE 100 index fell 0.4% as of 1053 GMT, while the midcap FTSE 250 dropped 1.2%.

Leadership Crisis within the Labour Party

The declines suggest lingering questions over Starmer's future even after his impassioned plea on Monday, where he urged voters and Labour Party lawmakers to stick with him and avoid a leadership contest he said would only bring chaos.

More ​than 80 Labour lawmakers have publicly called for Starmer to set a resignation date so the party could install a new leader in an orderly manner. Starmer, however, has vowed to stay at the helm.

Market Sentiment Amid Political Turmoil

"The markets are pretty nervous. People are just all scratching their heads and saying, 'What is he (Starmer) doing?'" said David Morrison, senior market analyst at Trade Nation.

Impact of Middle East Conflict on Investor Confidence

Investors were also concerned by the lack of progress in resolving the Middle East conflict. U.S. President Donald Trump said the ceasefire with Iran was "on life support."

Tehran rejected a U.S. proposal to end the conflict and stuck to a ‌list of demands that Trump described as "garbage".

Sector Performance Amid Uncertainty

Bank stocks in the UK fell 2.3%, dragged lower by a 5.2% decline in shares of Metro Bank and a 3.6% drop in Barclays.

Aerospace and defence stocks also slipped 2%, while the rate-sensitive real estate sector fell 1.9%.

Reporting Credits

(Reporting by Niket Nishant in Bengaluru; Editing by Maju Samuel)

Key Takeaways

  • FTSE 100 fell ~0.4% and FTSE 250 dropped ~1.2% as political uncertainty around Prime Minister Keir Starmer’s leadership weighed on sentiment.
  • Bond yields surged to near multi‑decade highs—10‑year gilts rose above 5.1%, 30‑year yields neared highs not seen since 1998—reflecting investor anxiety over potential fiscal looseness under a new leader.
  • Sterling weakened (~0.5% against the dollar), while sector losses were led by banks, aerospace/defence, and real estate amid geopolitical and domestic instability.

Frequently Asked Questions

Why did UK shares fall on Tuesday?
UK shares fell due to political uncertainty surrounding Prime Minister Starmer and renewed concerns over tensions in the Middle East.
How did the FTSE 100 and FTSE 250 perform?
The FTSE 100 index dropped by 0.4%, while the midcap FTSE 250 fell 1.2%.
What sectors were most affected by the decline?
Bank stocks, aerospace and defence, and the real estate sector experienced significant declines.
How did Middle East tensions affect UK markets?
Renewed concerns over unresolved Middle East conflict contributed to a decline in investor confidence and impacted the UK market.

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