Britain on Friday said it was advising against all travel to Iran as information suggested a Ukrainian airliner that crashed on Wednesday had probably been shot down by Iran. 'Given the body of information that UIA Flight 752 was shot down by an Iranian surface-to-air missile, and the heightened tensions, we are now advising British nationals not to travel to Iran,' Foreign Secretary Dominic Raab said. 'We also recommend against taking a flight to, from and within Iran,' he added, in a statement from the Foreign Office. 'We urgently need a full and transparent investigation to establish what caused the crash.'