‘Tehran’s tollbooth’: a visual guide to how a trickle of ships still passes through strait of Hormuz

Many of the vessels willing to make the crossing are taking an alternative route through Iranian waters

Threats to shipping have effectively closed the strait of Hormuz since the US-Israel war on Iran began four weeks ago – upending global oil and gas supplies and sending energy prices soaring.

In normal times, tankers carry about a fifth of the world’s oil and gas supplies through the narrow channel and on to the rest of the world, while about a third of the global fertilisers necessary for half of the world’s food production pass through in dry bulk vessels.