In November 1988, Hestair announced that they were selling the Dennis and Duple businesses to a management buyout team, operating under the name Trinity Holdings. The company was renamed Duple International. With declining coach sales, attempts were made to increase the sale of the bus bodywork, including plans for a design for the Scania N113. However, in July 1989, the decision was made to close down the Duple operation. The jigs for the Duple 300-series and the Duple 425 integral were sold to domestic rival Plaxton. Plaxton also bought Duple Services Ltd., the spares and repair business. The Duple body designs for the Dartline were sold to Carlyle Works of Birmingham. Thus ended 70 years of Duple Motor Bodies Limited.