Prime Minister Boris Johnson is facing mounting pressure to get a grip on the drip-feed of revelations about Downing Street rule-breaking as he fights to stay in office. Former Conservative minister Tobias Ellwood said the prime minister must “lead or step aside,” telling the BBC: “We need leadership.” The comments by the House of Commons Defence Committee chair came as further claims emerged of regular “wine time Friday” gatherings in Downing Street while coronavirus rules were in place. The Mirror said the weekly events are a long-standing No. 10 tradition, including under previous administrations, and they continued after COVID-19 restrictions were introduced prohibiting indoor mixing between households. The newspaper said staff bought a £142 ($194) fridge to keep their bottles of alcohol chilled, and the prime minister was aware of the socialising. A No. 10 spokeswoman said: “There is an ongoing investigation to establish the facts around the nature of …