SILVERSTONE, England :Oscar Piastri was feeling the pain after a British Grand Prix penalty cost him a win and handed it instead to McLaren teammate and closest Formula One rival Lando Norris. Instead of forging further ahead in the championship, the Australian saw his lead slashed to eight points after 12 of 24 races. Piastri was leading and following the safety car when it signalled it was about to return to the pits on lap 21. The Australian then braked suddenly, before the restart, and