<p><br /> The snow-covered Olympic Stadium sparkled under floodlights for the first time earlier.<br /> </p><p><br /> Prime Minister David Cameron, accompanied by a choir of local schoolchildren, hit the button for the big switch-on which shone a megawatt of light on to the showpiece venue.<br /> </p><p><br /> It was the first time that all 532 bulbs had been lit together - in a scene that will be repeated during the London 2012 Games.<br /> </p><p><br /> Mr Cameron joked that the £537 million stadium in Stratford, east London, looked more like a winter Olympic venue with ski-jumper Eddie the Eagle expected at any moment rather than the setting for the London 2012 summer Games.<br /> </p><p><br /> But he told the 400-strong invited crowd, which included 2012 builders at the site: "It is being delivered on time and on budget thanks to British genius and many of the people here."<br /> </p><p><br /> Introductions were carried out by London Mayor Boris Johnson, who did not seem aware that the lights take up to eight minutes to reach full power.<br /> </p><p><br /> "They are coming, they are coming," Mr Johnson told the crowd before all the lights had phased in.<br /> </p><p><br /> He described it as a "wonderful and historic evening", while also joking that with plans so advanced, including 75 per cent of building work complete, London 2012 might consider holding a snap Olympics now 17 months before the Games "to catch the world napping".<br /> </p>
