The 1984 British Grand Prix was won by what driver who is the only one to have been a champion for both Ferrari and McLaren?
Niki Lauda Andreas Nikolaus "Niki" Lauda (born 22 February 1949) is an Austrian former Formula One driver and a three-time F1 World Drivers' Champion, winning in 1975, 1977 and 1984. He is currently the only driver to have been champion for both Ferrari and McLaren, the sport's two most successful constructors. More recently an aviation entrepreneur, he has founded and run two airlines (Lauda Air and Niki). He is also Bombardier Business Aircraft brand ambassador. He was also a consultant for Scuderia Ferrari and team manager of the Jaguar Formula One racing team for two years. He is currently working as a pundit for German TV during Grand Prix weekends and acts as non-executive chairman of the Mercedes AMG Petronas F1 Team. Lauda owns 10% of the team.
McLaren MP4-31 The McLaren MP4-31 was a Formula One racing car designed by McLaren to compete in the 2016 Formula One season. The car was driven by and World Drivers' Champion Fernando Alonso and World Champion Jenson Button, and reserve driver Stoffel Vandoorne, who replaced Alonso at the Bahrain Grand Prix following the Spaniard's accident at the Australian Grand Prix which deemed him unfit for the next event. The car used the Honda RA616H power unit, the second engine developed by Honda since their return to the sport with McLaren in 2015.