Jeremy Thorpe, former Liberal party

member of Britain's Parliament and once a privy councillor to the queen, will go on trial tomorrow in London charged with plotting to murder a man who claimed to have had a homosexual relationship with him. Thorpe lost his Parliament seat after 20 years in last week's election. He and three friends are charged with conspiring to murder Norman V. Scott, 38, a former male model. The case is Britain's biggest political scandal since 1963, when War Minister John Profumo, a Conservative, resigned over his association with call girl Christine Keeler, who had a Soviet military attache as a client at the time.