Zak Brown says booing of Christian Horner and Max Verstappen ‘part of sport’

McLaren CEO Zak Brown was speaking on the opening day of testing in Bahrain (David Davies/PA) - (PA Wire)

McLaren boss Zak Brown has defended the booing of rival boss Christian Horner and world champion Max Verstappen at Formula One’s season launch in London.

Both Red Bull team principal Horner and his driver, Verstappen, were subjected to jeers at the O2 Arena by the British crowd.