Lewis Hamilton has stunned Mercedes by switching to Ferrari for the 2025 Formula 1 season. The seven-time F1 world champion, 39, joined Mercedes in 2013, and signed a new two-year deal last summer at the Silver Arrows, but has now had a shock change of heart as he tries for his record-breaking eighth title as he hurtles towards the end of his racing career. It’s understood Lewis’ contract contained a break clause after one year, which he has chosen to activate. Lewis said he was “so proud” of the success he had achieved in 11 years with Mercedes, adding in a statement: “Mercedes has been part …