In the mid 1970s, bus engineer Roy Cotterill and his brother-in-law Rolls-Royce marketing man Lionel Gibbs sat around Roy's dining room table in Stockton on Tees, Teesside, with the plans of a secret Rolls-Royce engine project and the engineering diagrams of a Daimler Fleetline bus. Could they mate the advanced engine with a passenger transit vehicle and if so what would be the cost implications and benefits / disadvantages. And what happened to the project?