Red Bull will be prepared for relentless questions about the future of Sergio Perez at the Hungarian Grand Prix this weekend. It emerged at Silverstone that Perez was at risk of losing his seat. The Mexican only signed a new contract last month, but his spiralling form may trigger a break clause. If he remains more than 100 points behind Max Verstappen after the Belgian GP, then the world champions could axe him during the summer break. Drivers elsewhere in the Red Bull family will be making their case to replace him. Daniel Ricciardo has been inconsistent at junior team RB this year but won s…