It’s 35 years since McLaren revolutionised the high-performance motoring world with the first carbon-fibre Formula One car, the MP4. Since then every McLaren car – racing or road – has been based around a carbon chassis. The MP4 debuted in 1981, when every other Formula One team was using aluminium. It won the British GP at Silverstone that year. Nikki Lauda later won two GPs in the follow-up car, the MP4B. In this video, MP4 designer John Barnard talks of the car’s beginnings with McLaren chief Ron Dennis.