British shares moved into negative territory in early trading on Monday as investors reduced exposure to risk assets following a sharp military escalation between Iran and Israel. The renewed exchanges - occurring on the 100th day of the Iran war - coincided with a broader sell-off across European markets and a surge in energy prices.
Market moves
The FTSE 100 was down 0.27% as of 03:20 ET (07:20 GMT). European peers fell more steeply: Germany's DAX slipped 1.16% and France's CAC 40 declined 0.86%.
Currency markets saw sterling edge marginally lower, down 0.01% against the U.S. dollar at 1.3340. The energy complex rallied sharply: Brent crude jumped 4.84% to $97.57 a barrel while West Texas Intermediate rose 4.42% to $94.54.
Military developments
Israeli air strikes struck military targets in western and central Iran, including an attack on the Karoun petrochemical complex in Mahshahr in southwestern Iran that forced an emergency evacuation of day-shift workers, according to reporting on the strikes. Iran's Islamic Revolutionary Guard Corps responded with strikes designated Operation Nasr, targeting Israel's Nevatim and Tel Nof air bases.
On Monday morning a fresh wave of Iranian ballistic missiles was launched toward Israel, prompting air-raid sirens across Tel Aviv and central Israel. Interceptions were observed overhead before the Israel Defense Forces cleared the public from protected spaces after conducting a situational assessment. A missile fragment from the Iranian launches struck several homes in a West Bank settlement, rescue services reported.
The IRGC's spokesperson said, in a quoted remark, that "we have proven that the skies of the occupied lands and the region are under our will and in the possession of the roar of the IRGC Aerospace Force's devastating missiles."
Regional spillovers
Other actors have joined the confrontation. Yemen's Iran-backed Houthis fired a further salvo at Israel and announced a complete ban on Israeli maritime navigation in the Red Sea. Iran also grounded civilian flights at airports in Tehran, Tabriz, Mashhad and Kermanshah, with aviation tracking data showing a near-total halt to Iranian air traffic. Multiple Iranian cities reported severe internet disruptions.
Iran's ambassador to Russia said the Strait of Hormuz would reopen only under new conditions set by Tehran and Muscat, including transit fees, according to his statement.
On the diplomatic and political front, U.S. President Donald Trump told Fox News he was "not happy" about Israeli strikes on Beirut that contributed to the exchange and phoned Israeli Prime Minister Benjamin Netanyahu urging restraint. Reports later indicated the U.S. president told Mr Netanyahu he would have "no choice" but to accept an agreement with Iran. Iran's Parliament Speaker Mohammad Bagher Ghalibaf declared U.S. bases and Israeli assets across the region "legitimate targets."
Energy policy and market response
Against this backdrop, OPEC+ agreed on Sunday to raise output quotas by 188,000 barrels per day in July, a step described as aimed at stabilising markets. The decision came before the latest escalation and has coincided with a notable jump in benchmark crude prices on Monday.
UK corporate round-up
In UK corporate news, Tate & Lyle agreed on Monday to be acquired in a £2.7 billion cash takeover by U.S. ingredients group Ingredion. The deal was announced alongside the market reaction to the geopolitical developments.
Bottom line
Markets moved lower and oil surged as the Iran-Israel exchanges represented a significant military escalation. The combined effect was pressure on European equities, slight weakness in sterling and a pronounced rise in crude benchmarks, while regional aviation and maritime activity experienced disruptions.