Amazing what you don't know about people....
Born Graeme Murray Walker on 10 October 1923, after leaving Highgate School he fought in World War II as a tank commander, a role that saw him take part in the brutal Battle of the Reichswald in 1945.
He initially developed a love for motorsport through his father Graham, who was a world-class motorcycle racer, whose success included winning the Isle of Man TT.
Walker briefly raced motorbikes himself before recognising that his talents lay elsewhere, and instead followed his father into commentary, too, initially alongside him at the TT.
He commentated on his first car grand prix race for the BBC at Silverstone in 1949 and continued to work on all forms of motorsport for the BBC and ITV over the next three decades while pursuing a full-time and successful career in advertising.
His company invented the famous slogan, "A Mars a day helps you work rest and play," although Walker insisted he has been wrongly credited with it himself. But he did admit to coming up with the equally famous jingle: "Opal Fruits - made to make your mouth water" among others.