McLaren has opened the next chapter in the story of its high-performance automotive progress - the MP4-12C has blown its top.It's 19 months since the MP4-12C first went on sale in South Africa and now McLaren has announced its next new supercar, the twin-turbo, V8, open-roofed, 468kW 12C Spider.The video below is the official launch video but, if you'd like to see more still shots, we have them too.'TRUE TO OUR ETHOS'The 12C Spider is based on the same super-stiff carbon-fibre monocell chassis as its coupe older brother so will be just as dynamic to drive but, McLaren says, removing the roof means new sensations experienced, emotions felt and the soul-stirring noises heard.Image gallery!Especially at the speeds of which tthe 12C Spider is capable."True to our ethos of offering high-performance without compromise," McLaren says, "the 12C Spider will be more usable than any car this exciting has a right to be."Jenson Button, questioned at the 2012 European F1 GP about what speed meant to him, explained the connection he felt with the machine he drives and what he senses when driving a 300km/h open-top car.But is he talking about his MP4-27 Formula 1 car or the 12C Spider? Check the video below... More information on this new and emotive addition to the McLaren Automotive range will be released in the next few days when ordering commences across the company’s network of retailers.