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Lewis Hamilton, 37, has become embroiled in a row over his jewellery ahead of the inaugural Miami Grand Prix today. New FIA race director Niels Wittich reminded drivers ahead of the race about the governing body's rules on accessories. FIA rules state: "The wearing of jewellery in the form of body piercing or metal neck chains is prohibited during the competition and may therefore be checked before the start."

Compared to his predecessor Michael Masi, Wittich has taken a tougher approach to the rules.

The rules affect Hamilton, who regularly sports jewellery and who branded the renewed focus on the issue "almost a step backwards".

The British Mercedes driver, who mostly wears his jewellery out of the car, said that during racing he only wears "earrings and nose ring, which I can't remove".

He has removed some of his jewellery in the car for the Miami GP and has been given