LONDON (Reuters) – British actor Clive Dunn, best known as a bumbling old butcher in the popular World War Two sitcom "Dad's Army", has died, his agent said on Wednesday. Dunn passed away on Tuesday, Peter Charlesworth said, adding that he believed the actor died in Portugal where he has lived for many years. He was 92. As Lance-Corporal Jones in Dad's Army – a hit television series in the 1960s and 1970s about a group of local volunteer members of the Home Guard – Dunn was famous for catchphrases such as "Don't panic!" and "They don't like it up 'em." He also had a No. …