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.