Before becoming the Labour Party leader in 2020, Keir Starmer had a long legal career. Keir often refers to his parents during political speeches - particularly his father, Rod, a tool-maker. But what else is known about the Labour Leader's heritage? This isn't all we've uncovered about the genealogy of Britain's most prominent politicians - to learn even more surprising discoveries, why not delve into Boris Johnson's family tree? We've also researched Rishi Sunak, Theresa May and Liz Truss, so there is so…