UK Prime Minister Keir Starmer said his government would react with “cool and calm heads” to US President Donald Trump’s announcement of a 10% tariff on imports from Britain.

Donald Trump was “acting for his country” when he slapped a 10 per cent tariff on all British exports to the United States, Sir Keir Starmer has said. The prime minister vowed to act in Britain’s interests in return, but indicated he would not hit back with retaliatory measures and instead would “keep a cool head”.