Invacar Ltd was a British manufacturer based in Westcliff-on-Sea, Essex, known for producing invalid carriages during the postwar period. The company's vehicles, known as Invacars, became one of the most widely used designs of their kind in Britain. They were developed by Derry Preston-Cobb and Bert Greeves, the latter of whom later gained recognition as a manufacturer of trials motorcycles. The Invacar represented a significant advance over earlier tricycle designs.…