Britain's FTSE 100 gained 0.08% on Wednesday's close as Brent crude fell for the sixth straight session after US President Donald Trump said discussions with Iranian officials on the sidelines of the United Nations General Assembly were "very productive."
At the same time, Trump said a peace deal was unlikely before the November midterms. Washington will "annihilate the Islamic Republic" if an agreement is not signed, the leader of the world's largest economy threatened in his UN speech. Meanwhile, Tehran said the Strait of Hormuz could be reopened within seven days if the US lifts its blockade on Iranian ports and meets some other demands. Analysts also attributed the drop in oil prices to Saudi Arabia being in the early stages of resuming flows from its East-West pipeline.
In economic news back home, the Organisation for Economic Co-operation and Development raised its 2026 economic growth forecast for the UK by 0.2 percentage points to 1.1%, while cutting the 2027 estimate by 0.1 percentage point to 1%. The UK's headline inflation is anticipated to reach 3.1% in 2026 before easing to 2.6% in 2027, down 0.6 percentage points and up 0.2 percentage points from the previous estimates, respectively.
Meanwhile, growth in Britain's private sector activity softened to a three-month low in September, with momentum declining in both manufacturing and services sectors, flash data from S&P Global showed. The flash UK PMI Composite Output Index stood at 51.7 in September, compared with 52.5 in the previous month and the consensus of 52.
"September is seeing a worrying combination of disappointingly sluggish economic growth and intensifying inflationary pressures, with subdued business confidence and high costs meanwhile continuing to discourage hiring," S&P Global Market Intelligence Chief Business Economist Chris Williamson said. "Output growth across the manufacturing and services PMI surveys has slowed to a pace consistent with the economy growing at a mere 0.1% quarterly rate."
In corporate news, JD Sports Fashion (JD.L) dropped 5.28% to become the worst performer on the blue-chip index after profit attributable to equity holders of the parent for the fiscal first half grew year over year to 167 million pounds sterling from 41 million pounds, while revenue declined to 5.90 billion pounds from 5.94 billion pounds. The sports, fashion and outdoor brands retailer maintained its guidance.
"JD 1H was a small beat versus expectations, with [adjusted pretax profit] of GBP282m (vs cons GBP279m) driven by a better-than-expected gross margin," Deutsche Numis Research said. "Beneath the headline beat, profitability remained mixed. North America was the main weakness, with EBIT down -32.0% yoy and margins down -230bps to 5.5%, while the core JD segment saw EBIT fall -18.9% with margins down -120bps."