Tom Uppington, managing director of Alvance British Aluminium, said: “We’ve increased production by around 10% in recent months in response to changing global trade flows following US tariffs, allowing us to enter the US markets for the first time as well as supplying existing and new customers in the UK and Europe.”

He added: “While the conflict in the Middle East has pushed aluminium prices higher, it has also contributed to rising energy costs.

“Because aluminium production is very energy intensive, higher UK electricity prices currently offset the benefit of stronger metal prices, meaning we continue to cap production broadly in line with our self-generated power.”

UK Minister for Trade Chris Bryant said it was “fantastic” Alvance British Aluminium had taken full advantage of “trade wins” secured by the UK government.

He said the UK was the only country in the world to secure a 25% tariff on steel and aluminium tariffs.