By Daniel Moxon Adrian Newey failed to rule out a Red Bull exit amid speculation he could be tempted by a huge Aston Martin offer. Formula 1 design legend Newey has been with Red Bull since 2006 and has overseen the creation of every one of the team’s title-winning cars. Aged 65, he now serves as their chief technical officer while technical director Pierre Wache oversees day-to-day development of their racing machines. But he could be tempted by the idea of a new challenge – and a huge payday. Lawrence Stroll, Aston Martin’s billionaire owner, is said to have personally extended a huge offer …