When the chequered flag waved at the end of the British Grand Prix, Sergio Perez crossed the line two laps behind teammate Max Verstappen. It was the latest disastrous weekend for a driver who knows he needs to be doing better considering he’s racing for the current leaders of the Constructors’ Championship. Sergio Perez came into the season knowing that despite finishing second to Max Verstappen last season in the Drivers’ Championship, he needed to take his performances up a level. Christian Horner told Perez to improve his qualifying performances and while there was a small uptick in his fo…