Seven-time Formula One champion Lewis Hamilton showed up to the Miami Grand Prix news conference covered in gems after motorsport ruling body FIA outlined a new jewellery ban. The Mercedes driver was wearing three watches, eight rings, four necklaces and two earrings on Friday, as could be seen in pictures. The ban, however, applies only while out on track. Drivers haven’t been permitted to wear jewellery since 2005, but the rule has never been stringently enforced – until now. Ahead of the Miami GP on Sunday, FIA introduced addenda to the scrutineering form that teams must sign coming into a …