The UK has condemned Iran’s brutal repression of protests as Donald Trump said he had sent a naval force to the region which could act with “speed and violence” if necessary.The US president, who has previously pledged help to the uprising against the Tehran regime, suggested the presence of the fleet was linked to Iran’s nuclear ambitions.In Westminster, Deputy Prime Minister David Lammy criticised Iran’s regime but declined to commit to banning the Islamic Revolutionary Guard Corps (IRGC).