Screeching brakes, diesel fumes, the endless popping as engines backfire and the sharp crack as another Scotch whisky is poured over ice - sometimes drink and driving do mix. At this weekend's Foster's British Grand Prix, the screeching became more squelching, for the spectators at least, and for those of us who had been kindly invited by William Grant & Sons (whose Grant's brand sponsors the Jaguar team) to watch the event, it gave us time to contemplate the somewhat unfair amount of opprobrium levelled against drink companies over the driving laws and Formula One sponsorship.