UK says 'nothing is off the table' in response to US tariffsGetty ImagesDowning Street has said no reciprocal action is "off the table" if the US does not honour its tariff deal with the UK, but added that "no one wants a trade war". It comes after US President Donald Trump's announcement of a 15% tariff on all countries from Tuesday. The prime minister's official spokesman said the "majority" of the UK-US deal, such as the tariffs on cars, steel, and pharma, was not expected to change, but described the situation as "evolving" and said discussions between the UK and US were ongoing. Meanwhile, US trade representative Jamieson Greer said on Sunday that trade deals allies had negotiated would still stand. On Friday, the US Supreme Court outlawed most of the global tariffs that Trump had announced last year, saying the president had overstepped his powers. That ruling affected all tariffs Trump had introduced using the International Emergency Economic Powers Act (IEEPA), which includes all those announced on "Liberation Day" last year. Trump then announced a new 10% global tariff would replace the ones struck down, and on Saturday revised the rate to 15%. That 15% tariff will be introduced as a temporary solution under Section 122 of the 1974 Trade Act. Some products will be exempted under the levy, such as critical minerals, metals and pharmaceuticals. Analysis from think tank Global Trade Alert (GTA), external found that the UK will be among the countries worst hit if the 15% global tariff goes ahead because it had negotiated a 10% tariff deal with the US. Meanwhile, the GTA said countries such as China and Brazil, which currently have higher tariff rates, would be better off. The 15% global levy would be in addition to any other existing tariff. As such, it does not affect tariffs the UK and US had agreed on specific sectors, such as steel, aluminium, pharmaceuticals, automobiles and aerospace, which represent most of the UK's trade with the US. This is because the Section 122 legislation Trump has said he will use to impose his 15% tariff is different from the way in which tariffs on specific sectors are introduced. The British Chamber of Commerce's president, Andy Haldane, told the BBC the UK would "sit towards the bottom of league table" of trade partners if Trump's 15% tariff came into effect."The perversity of what happened of the weekend was that those who got good deals, the allies, have been most disadvantaged," he added.'We expect to stand by them'US trade representative Greer told CBS that he had spoken to the EU and other countries over the weekend."The deals were not premised on whether or not the emergency tariff litigation would rise or fall," he said."These deals are going to be good deals. We expect to stand by them.