Lewis Hamilton is bracing for what he's calling the biggest regulation change of his career ahead of a make-or-break Formula One season

The seven-time world champion will enter his second campaign with Ferrari hoping an overhaul of the sport's technical rulebook can provide him with a chance to revive his fortunes.

Meanwhile - worries for Williams, who've announced the team wouldn't be taking part in next weeks Barcelona testing after after failing to get their new car ready in time.

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