When Malcolm Turnbull rode to power in Australia in 2015, he did so on a wave of optimism, saying he would bring stability to a troubled parliament. But his moderate leadership was always under attack from right wingers in his own Liberal Party. Last night he became the fourth Australian Prime Minister to be ousted in a coup by colleagues in a decade. But the man who took him down didn’t seize the prime ministerial crown. The new PM is Mr Turnbull’s onetime ally Scott Morrison. A warning: there is flash photography from the start of this report.