The ‘rare combination’ behind Britain’s newest F1 driver Arvid Lindblad's eyes light up. The 18-year-old who is about to become Britain's youngest ever Formula 1 driver is sitting on a beach in Bahrain, a Gulf mist obscuring the still-rising sun, and he's pondering a question. He's been polite but wary so far. A five-minute drive from the circuit where he and his Racing Bulls team are completing their preparations for his grand prix debut in Australia at the beginning of March. On the cusp of achieving his lifetime's dream, understandably he wants to make sure he does not say anything he might regret. But when he's asked what has been the best thing that's happened to him since he became an F1 driver, the joy inside him bubbles to the surface, and he can't resist a little smile. "Since becoming a Formula 1 driver… the best thing was just becoming a Formula 1 driver," he says.…