UK equities retreated modestly on Wednesday as escalating tensions between Washington and Tehran over the Strait of Hormuz overshadowed closely watched US inflation data due later in the session.
The FTSE 100 fell 0.08% as of 03:25 ET (07:25 GMT), while Germany’s DAX advanced 0.12% and France’s CAC 40 declined 0.19% across the Channel.
Sterling held broadly steady against the US dollar, with GBP/USD edging 0.03% higher to trade at 1.3510 during the morning session.
Geopolitical tensions sharpened after US Central Command confirmed that American forces had disabled the steering system of the Panama-flagged cargo ship M/V Vela Nova in the Gulf of Oman.
CENTCOM said the vessel had attempted to breach the US blockade affecting Iran-bound shipping, prompting a US Navy MH-60 helicopter to fire two Hellfire missiles into the ship’s engine room.
US forces have now redirected 55 vessels, disabled three and boarded another two as of August 11, according to CENTCOM’s latest figures.
President Donald Trump reinforced Washington’s stance on Tuesday, saying “We have total control over the Strait of Hormuz right now… We own it,” and warning that any Iranian retaliation would face a “forceful” response.
Iranian foreign ministry spokesperson Esmail Baghaei disputed the US account, blaming the closure of the Strait on “US-Israeli military aggression” and saying negotiations with Oman over a new transit route were progressing “smoothly and constructively.”
Jefferies strategist Mohit Kumar warned that a lasting resolution remains elusive, saying in a client note “there is no easy way out of the current situation, with Iran unlikely to give up control over the Strait and US unwilling to accept tolls.”
Kumar added that any near-term agreement would likely be “more a fudge… rather than a long-lasting peaceful solution,” underlining the fragility of any diplomatic progress in the region.
Trump separately confirmed that his aircraft was secretly changed during his departure from last month’s NATO summit in Turkiye following an alleged Iranian assassination threat against him.
Energy markets moved higher as traders assessed the risk of prolonged disruption to oil supplies, with Brent crude gaining 0.66% to $89.50 and WTI crude rising 0.77% to $83.83.
Gold futures climbed 0.41% to $4,459.47 while spot gold advanced 0.73% to $4,399.69, reflecting broader demand for safe-haven assets amid the geopolitical uncertainty.
On the corporate front, Balfour Beatty (LSE:BBY) lifted its 2026 operating profit growth guidance to the low double digits, supported by robust demand across its US building operations and UK power infrastructure activities.