U.S. tariffs strain allies

The U.S. has put tariffs on most British goods, leaving the U.K. to chase sector-by-sector relief instead of relying on stable trade rules. (commonslibrary.parliament.uk) A House of Commons Library briefing published on April 14, 2026, says a 10% tariff now applies to most U.K. goods entering the U.S., while steel, aluminum and derivative products face higher duties. It says President Donald Trump began rolling out the measures after taking office on January 20, 2025. (commonslibrary.parliament.uk) The same briefing says the U.K.-U.S. Economic Prosperity Deal announced on May 8, 2025, only partly softened the hit. It set terms for tariff relief on cars, steel, aluminum and pharmaceuticals, but the Library says the agreement has been only partially implemented so far. (commonslibrary.parliament.uk) U.S. trade officials now list the U.K. deal alongside separate frameworks with the European Union, Japan, Indonesia and Malaysia. A Congressional Research Service timeline says the administration moved into negotiations with some partners while talks with others, including Canada and India, appeared to stall. (ustr.gov) (congress.gov) That leaves allies dealing with tariffs through bilateral bargaining rather than through one common set of rules. A July 31, 2025 executive order said tariff rates would depend in part on whether trading partners were making “meaningful trade and security commitments” and aligning with the United States on economic and national-security matters. (govinfo.gov) For British exporters, the stakes are large. The Office for National Statistics says the United States was the U.K.’s largest export partner for goods in 2024 and its largest trading partner for services, while a U.K. government factsheet says the U.S. accounted for 17.5% of total U.K. trade in the four quarters to the end of the third quarter of 2025. (ons.gov.uk) (assets.publishing.service.gov.uk) The carve-outs are specific and narrow. The House of Commons Library says the U.K. can export up to 100,000 passenger vehicles to the U.S. at a 10% tariff, pharmaceuticals can enter tariff-free under the deal, and steel and aluminum relief depends on meeting U.S. supply-chain security requirements. (commonslibrary.parliament.uk) Washington describes the arrangement as a negotiated trade-off, not a return to across-the-board liberalization. The White House said the May 8, 2025 deal would create a $5 billion opportunity for new U.S. exports, including more than $700 million in ethanol and $250 million in other agricultural products, while the U.K. government says it agreed to import 1.4 billion litres of U.S. bioethanol tariff-free. (whitehouse.gov) (gov.uk) The tariff map has kept shifting even after those deals. UN Trade and Development said on February 27, 2026 that U.S. tariffs now stack across country-specific and sectoral measures, with the U.K. getting exceptions in areas such as autos, steel and aluminum rather than a clean exemption from the broader system. (unctad.org) The result is a trade relationship that runs on exemptions, quotas and follow-on talks. For allies like Britain, access to the U.S. market now depends less on predictable rules than on whether the next round of negotiations produces another carve-out. (commonslibrary.parliament.uk) (ustr.gov)