Yup, a sad day.
What a legend! Having read some of today's tributes to him and learning of his entry into racing, he becomes all the more impressive. He only took up racing because the bloke who was driving the car he was preparing had to give it up because his wife told him to! What a brilliant story.
He spoke of his 'mechanical sympathy' for the car. With his engineering knowledge being so honed, he would drive a car to its limit but never over. He knew exactly how hard to push to extract the maximum whilst ensuring the car would come home.
RIP Sir Jack