The war's now been going on for about eight weeks and the U.S. and Iran remain in deadlock.
Investors have swung between hope for an imminent end to the conflict and fear that it might not come soon at all, and oil prices continue to push past $100 a barrel while the Strait of Hormuz stays effectively shut.
While corporate earnings have so far held up reasonably well, the fragile situation in the Middle East and the oil price surge present risks, keeping executives on their toes.
UK retail sales data for March is due later in the day, which will provide a sense of the strength of consumer spending amid the war.
A survey released on Thursday showed British consumer morale slid this month to its lowest since October 2023, as households ramped up their expectations for price rises.
British manufacturers have also turned their most pessimistic since the start of the COVID-19 pandemic and a measure of expectations for inflation has surged.