Soon after Bob Grace retired from his job as a regional director at Jaguar Landrover in 2018, he realised “you can only have so much free time” and decided to start a new career. Then 56, the father-of-five admits he had “no plan for the future” other than knowing he wanted to leave his corporate career. He started taking some of his private pension but quickly came to the conclusion that he did not want to “lose his brain”. So a year on, he too…