JUSTIN TALLIS/GETTY IMAGES Boris Johnson is still clinging to the Downing Street post, despite the resignations today of Rishi Sunak, the chancellor, and Sajid Javid, the health secretary. This is wrong. He has lost the confidence of his party and the country. Just two weeks ago, the Conservatives suffered historic by-election defeats in two previously stable seats. This highlighted the depth of hostility towards Mr Johnson in very different parts of the country and prompted the resignation of the party chairman. There is no conceivable chance that Mr Johnson, who failed to secure the support of 148 MPs in a confidence vote last month, will be able to regain his power to provide the effective leadership the country needs at a time of acute national crisis. Every day that