UK: The British Grand Prix was red-flagged on Sunday (Jul 3) after a horrifying opening-corner multi-car accident at Silverstone, with Zhou Guanyu’s Alfa Romeo flipping over and flying over the circuit’s safety barrier. Marshals raced to rescue Zhou, who was stranded in his wrecked car, as Max Verstappen overtook polesitter Carlos Sainz at the first corner. The Mercedes of George …