He promised to shake up the UK’s political system.<br /><br /> And on Tuesday, in his first party conference speech as new Labour leader, Jeremy Corbyn delivered.<br /><br /> There was no apology for the Iraq war just yet, as some had predicted, but the veteran left-winger was scathing about it and Britain’s possession of nuclear weapons – arguments that helped him come from nowhere to secure a landslide leadership win earlier this month.<br /><br /> “What happened this summer in the Labour leadership election was nothing short of a political earthquake,” he told delegates to the annual conference in the southern English city of Brighton <br /><br /> “According to the script, Socialists and Social Democratic parties were in decline. Social Democracy itself was dead on its feet. Yet something new, invigorating, popular and authentic has exploded.”<br /><br /> Corbyn, 66, pledged to listen to the thousands of new members who have joined Labour since he ran for leader, many of them younger voters disillusioned with establishment politics