Professor Ludlam, under counsels questions, amended his earlier submission that in the late 1980s, NANB Hepatitis was believed to be a mild non-progressive condition following the first liver biopsy undertaken in 1985. He corrected this view to say that he was aware of the liver biopsy undertaken in Sheffield in 1978, and thus there was a likelihood of prior knowledge of the condition of NANB Hepatitis earlier than the late 1980s.