Analysis suggests the United Kingdom could be severely impacted by a proposed 15% global tariff from the US, potentially disadvantaging allies who had previously secured better trade deals.

• The UK might be "among the worst hit" if the tariff is implemented, according to the British Chamber of Commerce.
• The US Supreme Court recently outlawed most of the tariffs Trump announced last year, stating the president exceeded his authority.
• However, the proposed 15% levy is distinct from existing sector-specific tariffs, and deals negotiated with allies are expected to stand according to US trade representative Jamieson Greer.