Ripper's appeal over life ruling.
Mr Justice Mitting announced his decision in London on July 16, ruling that the serial killer of 13 women must serve a ''whole life'' tariff.
His case was being heard today at the Court of Appeal by the Lord Chief Justice, Lord Judge, Mr Justice Calvert-Smith and Mr Justice Griffith Williams.
Now known as Peter Coonan, the former lorry driver, from Bradford, West Yorkshire, was convicted at the Old Bailey in 1981.
Sutcliffe, pictured, now 64, received 20 life terms for the murder of 13 women and the attempted murder of others in Yorkshire and Greater Manchester.
Sutcliffe's 13th victim was student Jacqueline Hill, 20, of Middlesbrough, who was found battered to death on November 17, 1980, in Leeds.
Mr Justice Mitting, when giving his ruling, said the murderer had caused ''widespread and permanent harm''.
He said: ''The only explanation for it, on the jury's verdict, was anger, hatred and obsession.
''Apart from a terrorist outrage, it is difficult to conceive of circumstances in which one man could account for so many victims. Those circumstances alone make it appropriate to set a whole life term.'' Sutcliffe is being held in Broadmoor top security psychiatric hospital after being transferred in 1984 suffering from paranoid schizophrenia.