UK is not planning retaliatory tariffs on the US after Trump announced a 25% tariff on car imports, causing global carmaker shares to drop.Rachel Reeves stated the UK's stance against escalating trade wars, emphasizing they are detrimental to both countries involved.Keir Starmer expressed concern over the new US tariffs on cars and light trucks, emphasizing the need for a negotiated resolution.US carmakers like General Motors and Ford saw share declines after Trump's tariff announcement, impacting European and Asian markets as well.Aston Martin, Jaguar, and Land Rover are major UK exporters to the US, with Aston Martin shares falling significantly post-tariff news.European carmakers, particularly Volkswagen, experienced share losses due to their exposure to tariffs, leading to a decline in stock indices.Asian car manufacturers like Toyota, Honda, and Hyundai also faced stock drops following the tariff announcement.The UK's Society of Motor Manufacturers urged government support amid trade tensions and declining car production.UK government may review electric vehicle incentives for companies like Tesla, while striving to protect UK car manufacturers from tariffs.The EU, Canada, and Germany expressed strong opposition to Trump's tariffs, highlighting potential negative impacts on businesses and consumers.