The 42-year-old has made the California chapter of his biography a key part of his public persona. He knew from a young age that he wanted to make an impact on as many people as possible

He frequently cites his time there in his 20s and early 30s to burnish his credentials as a business-savvy leader.

"I have lived and worked in California and I actually think it's one of the reasons that I would be good at this job."

Mr Sunak started his years in America at Stanford University's Graduate School of Business as a Fulbright Scholar, heading to Silicon Valley in 2004 as the internet boom was under way.

Among the classes Mr Sunak took was "The Paths to Power", intended to help students understand power and how to wield it effectively.

He did not earn any particular academic distinctions and his professor in that class was unable to recollect him - understandably, given he taught 100 students a year.

A more life-changing landmark in those early US years occurred when he met his wife, Akshata Murty, daughter of the founder of Indian tech firm Infosys.