Drifting off the coast of Iran, a narrow stretch of water that is barely 21 miles wide at its most slender point has become the centre of a geopolitical showdown with global consequences. The Strait of Hormuz, a sliver of sea connecting the Persian Gulf to the Gulf of Oman, is one of the world's most critical energy arteries — and its closure during the recent US-Iran war sent shockwaves through the global economy.
The Strait of Hormuz is a 96-mile-long shipping channel that serves as the only sea passage from the oil-rich Persian Gulf to the open ocean. Every day, tankers carrying about one-fifth of the world's petroleum and liquefied natural gas (LNG) pass through its waters. For decades, the Strait has been a chokepoint: a narrow, defensible line that can be threatened by mines, missiles or naval forces. Iran, which has a long coastline along the Strait, has repeatedly warned that it could shut the waterway in response to sanctions or military action.
“Explaining the strategic importance of the Strait of Hormuz in the US-Iran conflict.”
That threat became a reality in February this year, when US and Israeli strikes on Iran prompted Tehran to effectively close the Strait. Ships found themselves trapped or rerouted, and global oil prices spiked. The closure was one of the most dramatic consequences of a conflict that began on 28 February and — despite an April ceasefire — has seen intermittent exchanges of fire. US President Donald Trump cancelled scheduled attacks in June, saying a “great settlement” was imminent. On 12 June, Pakistani Prime Minister Shehbaz Sharif, acting as mediator, announced that a final, agreed-upon peace deal had been reached. Iran’s Foreign Minister, Seyed Abbas Araghchi, confirmed on state TV that the deal would include reopening the Strait, along with the lifting of a US blockade on Iranian shipping.
For UK readers, the stakes are tangible. Britain relies heavily on oil imports, and a prolonged closure of the Strait would push up fuel prices, from petrol to household heating oil. It could also disrupt supplies of LNG, which the UK uses to generate electricity. Even a temporary closure can create volatility in global energy markets, affecting the cost of living. The UK government has previously worked with allies to keep the Strait open, including sending warships to escort tankers.
Q: Why is the Strait of Hormuz so important? About 20% of the world's oil and LNG passes through the Strait of Hormuz each day, making it the most important energy chokepoint on the planet. Countries like Japan, China, India and South Korea are especially dependent on Gulf oil shipped through this narrow corridor.
Q: How could Iran actually close the Strait? Iran could deploy mines, anti-ship missiles, or small speedboats to disrupt shipping. It has also threatened to use submarine-launched mines. Even the threat of closure can drive up insurance rates for tankers and push oil prices higher.
Q: What is the current status of the Strait? As of June 2026, a peace deal between the US and Iran has been agreed in principle, according to Pakistani mediators and US officials. The deal includes immediate reopening of the Strait in exchange for lifting the US blockade. However, the final text has not yet been signed, and Iran’s Supreme National Security Council is still debating the terms.
What happens next depends on internal Iranian approval. If the deal is signed remotely — as Iran’s foreign minister has suggested — the Strait could reopen within days. But there are opponents within Iran’s security establishment, and the US has warned that any reopening is conditional on Iran meeting its obligations. For now, the world watches a narrow ribbon of water, waiting to see if the oil will flow freely again.