Many of us who were born here exist without such a clear-cut picture of our ethnic background as Rishi Sunak. Lots of us have a complex family history, or, in my case, unknown key relatives.

Rishi Sunak became leader of the Conservative party and the UK’s 57th prime minister in October 2022. He is the country’s first British Indian prime minister. His father Yashvir Sunak was born and ...