After the court case, Albert tells Del and Rodney that every time himself and Grandad were short of some money, Albert would just fall down a hole. In the court case, it was revealed that the incidents occurred after the war. In "Tea for Three (1986)", Albert said that he and Grandad didn't speak to each other after they met and rowed over Ada, Albert's future wife. In "Miami Twice: The American Dream (1991)", Albert revealed that he left Ada behind when he went to war. So, Albert clearly met Ada before the war and therefore couldn't be speaking to Grandad after the war when they allegedly worked together falling down holes.