The 1980s started much as the 1970s had ended: Alain Prost took over from Tambay but Watson and he rarely scored points. Under increasing pressure since the previous year from principal sponsor Philip Morris and their executive John Hogan, Mayer was coerced into merging McLaren with Ron Dennis's Project Four Formula Two team, also sponsored by Philip Morris. Dennis had designer John Barnard who, inspired by the carbon-fibre rear wings of the BMW M1 race cars that Project Four was preparing, had ideas for an innovative Formula One chassis constructed from carbon-fibre instead of conventional aluminium alloy. On their own, they lacked the money to build it, but with investment that came with the merger it became the McLaren MP4 (later called MP4/1) of , driven by Watson and Andrea de Cesaris. In the MP4, Watson won the British Grand Prix and had three other podium finishes. Soon after the merger, McLaren moved from Colnbrook to a new base in Woking and Dennis and Mayer initially shared the managing directorship of the company; by 1982, Mayer had departed and Tyler Alexander's and his shareholdings had been bought by the new owners.