Wiki says: The combination of rigid hull and large inflatable buoyancy tubes seems to have been first introduced in 1967 by Tony and Edward Lee-Elliott of Flatacraft,and patented by Admiral Desmond Hoare
in 1969 after research and development at Atlantic College
in South Wales
My Flatacraft Force 4 has the serial number 40816 stamped on the port side of the transom. Does anyone know whether factory records still exist for dating purposes? Also, did anything come of the resurrection of Flatacraft in the late 1990s?