A Barclays survey reports that around four in five UK businesses experience a negative impact from fallout linked to the Iran war. The finding, cited across multiple outlets, indicates that the majority of firms say conditions created by the conflict and related developments are affecting their operations. In particular, more than two-thirds of the businesses surveyed—64%—report that energy and fuel costs are impacting their business. The coverage describes the survey as evidence of how increased costs and wider economic uncertainty associated with the conflict are filtering through to UK companies. While the reports focus on the overall proportion of firms affected, they do not specify the size of the sample or additional categories of impact beyond energy and fuel costs in the provided text. Overall, the sources present a consistent picture: most responding firms identify cost pressures, especially in energy and fuel, as a key channel through which Iran war-related fallout is affecting them. The results are described as reflecting broad business strain rather than impact confined to a small sector.