Stephen Gough, 52, has been jailed for another 21 months after turning up naked for his trial at Perth Sheriff court.Gough appeared naked in the court dock and was found guilty of breaching the peace and being in contempt of court.Sheriff Fletcher told him: "The court expects people to come here in a decent state of dress."Gough earned the title Naked Rambler by walking unclothed from Lands End to John O'Groats after quitting his job as a lorry driver.The so-called Naked Rambler is back behind bars after stripping off less than a minute after being released from prison.Stephen Gough was arrested outside Perth Prison almost immediately after he was released from his previous 21-month sentence.The hearing was initially held up while court staff found a sheet of brown paper for him to sit on "for hygiene reasons".The former Royal Marine, from Eastleigh in Hampshire, has been behind bars in Scotland for much of the past decade.He has been repeatedly arrested in the street outside Perth Prison by police waiting for him to be released at the end of each sentence.He claims that arresting him for walking around naked is a breach of his human rights and his right to freedom of expression.