Reports of the sad death of Tom Walkinshaw, aged just 64, are already eliciting tall trackside tales about his racing successes, his many battles with motorsport’s rule-makers, his Jaguar Le Mans victories and his vital involvement in the early career of Michael Schumacher.  However, there’s another important tranche of his work that deserves attention: the road car design and engineering business he established under the TWR banner in a rambling former telecoms centre on an Oxfordshire hillside at Leafield.