Sodor China Clay Rolling Stock | Thomas the Tank Engine ...
These trucks are used for transporting China clay down from the Clay Pits. They are first loaded with China clay and are taken up to Brendam Docks by Bill and Ben.The clay is then loaded onto a ship and is taken to the Mainland.. The mineral trucks were later replaced with 6-plank open trucks; these trucks had covered "hoods" used to keep the clay dry.