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.
Chris Amon Christopher Arthur Amon {'1': ", '2': ", '3': ", '4': "} (20 July 1943 – 3 August 2016) was a New Zealand motor racing driver. He was active in Formula One racing in the 1960s and 1970s and is widely regarded as one of the best F1 drivers never to win a championship Grand Prix. His reputation for bad luck was such that fellow driver Mario Andretti once joked that "if he became an undertaker, people would stop dying". Former Ferrari Technical Director Mauro Forghieri stated that Amon was "by far the best test driver I have ever worked with. He had all the qualities to be a World Champion but bad luck just wouldn't let him be".