Perjury prosecutions and jail happens in the UK (Score 1)

See Wikipedia entries on Jonathan Aitken and Jeffrey Archer, both well known political figures. Both brought actions for libel against newspapers which had uncovered unsavoury behavior, and both perjured themselves in doing so. Aitken's case, about corrupt involvment with Saudi arms dealers while he was a Minister of State for Defence Procurement, unravelled at the time. He was subsequently tried for perjury and perverting the course of justice and sentenced to 18 months, serving 7. Archers libel case against the newspaper, about his use of a prostitute, was won at the time. His perjury was exposed much later when he stood as a candidate for election as London Mayor. He was convicted of perjury and perverting the course of justice and sentenced to 4 years, serving 2.