Of all the chief executives at a FTSE 100 company, the one I am coming to know best is Jean-Sébastien Jacques, the 46-year-old Frenchman appointed to run the Rio Tinto mining group last year.
Mr Jacques has lived in London for more than a decade and was “insanely happy” when he became a British citizen in 2013. He loves rugby. He travels constantly. His wife nicks his socks and he lives around the corner from a French bakery selling bread as good as any you can get in Paris.
I learnt all this from French Yummy Mummy, a blog by a gabby London-based Parisian engineer named Muriel Demarcus who is, I recently discovered, also Mr Jacques’ wife.
She quit her job in France to follow him to Britain, where her blog shows she is regularly appalled by sexist dinosaurs, the National Health Service and Marks and Spencer underwear. Having once been a trailing spouse in London myself, I admire Ms Demarcus’s initiative.
But I was more interested to find out the other day that she is not the only one in the family with a passion for posting. Mr Jacques turns out to be an eager user of Yammer, one of the many internal social media messaging systems that have spread rash-like through the world’s offices in recent years.