Labour MP Clive Lewis said: “The UK must stand firmly for international law, or admit it no longer believes in it.”

Labour MP Clive Lewis said: “The UK must stand firmly for international law, or admit it no longer believes in it.”

Meanwhile, MP Apsana Begum tweeted: “The Prime Minister's support for Trump will forever haunt his legacy.”

Former Labour MP Diane Abbott added: “If you cannot say this is illegal, all your talk of human rights, the law and democracy is so much hot air.”