when one ship could move a market
Through the spring and summer of 2026, Iran and the United States slid into open confrontation, an escalation many analysts struggled to tie to any clear war aim.1 With no obvious path to a decisive victory, the Strait of Hormuz became the pivot of the whole conflict, and the United States reached again for a familiar argument about keeping the world's fuel routes open, not for the first time in its history.2
For a stretch of the crisis, UK wholesale gas could swing violently on whether a single cargo cleared the strait. The threat of closure alone was enough: on 13 April 2026 the benchmark jumped 11.7% in one session, and front-month gas later peaked near 151 pence a therm.3 As the conflict settled into a grind and the market priced the risk in, that sensitivity faded. By late May prices had fallen back toward 96 pence, and the June reopening eased them further.4 The strait stayed a focal point for political argument long after it stopped moving the market.
UK NBP front-month wholesale gas, pence per therm. Reported levels at selected dates, April to June 2026; the late-April closure scare marks the peak. Figures from notes 3 and 4, not a continuous daily series.