UK vs US Tariffs: What's Next After Trump's 15% Levy? | Trade War Explained (2026)

The UK government has issued a strong statement regarding the potential for trade tensions with the United States, emphasizing that no reciprocal action is 'off the table' if the US fails to honor its tariff agreement with the UK. However, they also stressed that no one desires a trade war, indicating a pragmatic approach to negotiations.

The prime minister's official spokesman revealed that the majority of the UK-US deal, including tariffs on cars, steel, and pharmaceuticals, is unlikely to change. Nonetheless, the situation remains fluid, with ongoing discussions between the UK and US. This comes after the US Supreme Court ruled that President Trump's tariffs on most global imports were unconstitutional, as they exceeded his authority under the International Emergency Economic Powers Act (IEEPA).

The 15% global tariff, which will be imposed temporarily under Section 122 of the 1974 Trade Act, will apply to various products, with some exemptions for critical minerals, metals, and pharmaceuticals. Meanwhile, countries like China and Brazil, which have higher tariff rates, may benefit from this change.

It's important to note that the new tariff does not impact the specific sectors where the UK and US have agreed on tariffs, such as steel, aluminum, pharmaceuticals, automobiles, and aerospace, which constitute the majority of UK trade with the US. This is because the Section 122 legislation differs from the method used for tariffs on specific sectors.

The British Chamber of Commerce's president, Andy Haldane, warned that the UK would face trade disadvantages if Trump's 15% tariff were to be implemented. He expressed concern over the recent developments, suggesting that allies who secured favorable deals might now be at a disadvantage.

US trade representative Greer confirmed that discussions with the EU and other countries had taken place over the weekend, emphasizing that the deals were not contingent on the outcome of the emergency tariff litigation. He assured that the US is committed to honoring these agreements and expects its partners to do the same.

The UK government's spokesman emphasized the importance of constructive engagement with the US to maintain the UK's competitive advantage, avoiding a trade war that could escalate tensions. Richard Rumbelow, from the manufacturing industry body Make UK, shared concerns about potential trade disruptions for UK exporters entering the US market, calling for urgent clarity on the treatment of UK exports upon arrival in the US.

UK vs US Tariffs: What's Next After Trump's 15% Levy? | Trade War Explained (2026)

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