Iran Conflict Disrupts Hormuz Strait, Driving Fertiliser and Fuel Costs for UK Farmers

Overview

The article examines how the conflict in Iran and disruption of the Strait of Hormuz are already affecting UK agriculture by threatening supplies of two critical inputs: fuel and fertiliser. The immediate impact is a sharp rise in red diesel costs and fertiliser prices, with nitrogen fertiliser highlighted as especially exposed. The UK imports around 60% of its nitrogen fertiliser, and global market dynamics mean prices are highly sensitive to disruptions. A third of the global fertiliser trade passes through Hormuz, contributing to upward price pressures that could accumulate if the conflict persists. Farmers face difficult cost–benefit calculations as they weigh nitrogen inputs against crop prices while awaiting policy clarity.

Policy responses and industry dynamics are also discussed, including CMA monitoring of fertiliser and agricultural fuel supply issues, pending Environmental Land Management Schemes, and efforts to diversify fertiliser types. The piece closes with concerns about the autumn purchase window and the broader question of UK food self-sufficiency, which sits around 62%.

Geopolitical context and its agricultural implications

The article analyzes how ongoing Middle East tensions, particularly in relation to Iran and the strategically important strait of Hormuz, could affect the UK farming sector. While the direct origin of fertiliser inputs is global, the strait’s disruption is linked to price volatility in fertilisers and fuel—two inputs that are central to farming operations in the UK. The immediate effect reported is a notable increase in red diesel prices, a rebate-supported fuel widely used in agriculture, which has surged by around 60% in comparison with retail fuel pump prices for cars. The combination of higher fuel costs and potential fertiliser price shocks compounds existing cost pressures on UK farmers and the agrifood supply chain.