Boris Johnson's family research was very interesting indeed. On his grandfather's side of the family, he discovered how his great-grandfather (a journalist and politican) in Turkey was murdered due to his critics about the new Turkish politics - as far as I remember when I watched it!
On his grandmother's side of the family, Boris discovered how he's connected to royalty. His great-great-great-great-great-great-great-great grandfather was King George 2nd!
Richard Crane