1985 was to see Keke Rosberg set the all-time Formula 1 qualifying lap record for 17 years after posting a fastest qualifying time for the race with an average speed of . Silverstone, which was already a very fast circuit, was becoming faster and faster and the cars were lapping the circuit in the low 1-minute range. The race was an exciting one with Brazilian rising star Ayrton Senna making a great start from 4th and taking the lead by the first corner. He led until late in the race when his car was running out of fuel while Prost was pushing him hard; Senna eventually ran out of fuel and Prost went on to take victory. 1986 saw a huge crowd thanks to Mansell being a favourite to win; his newly found fame and place in a competitive team would help the British Grand Prix to see huge crowds for several years. This race saw 42-year-old Jacques Laffite get involved in a first corner accident and slam head-on into the barriers, breaking both his legs and ending his Formula One career. Nigel Mansell, whose car broke at the start of the first race, got into his teammate Piquet's spare car and won the race; although this was the last F1 race at Brands Hatch. A number of people had concerns about the speeds of the cars on the small track; particularly the European Grand Prix held at Brands Hatch the previous year. The southern English circuit was getting to be very fast- now with these -plus, cars, pole sitter Piquet's average qualifying speed was and his lap time was in the 1 minute 6-second range, compared to the 1 minute 20-second range in 1976. But Brands Hatch's demise was for other reasons: the international motorsports governing body at the time, (FISA), had instituted a policy of long-term contracts for one circuit per Grand Prix. Brands Hatch was perceived as a poorer facility, and considering most of the track was located in a very old forest it did have very little run-off and room to expand, something Silverstone had in acres. Silverstone and the BRDC had signed a seven-year contract with Formula 1 and FISA at some point in 1986, to run from 1987 to 1993.