Descended through his father from a long line of Liberal MPs, Moore joined the party in 1951 and was an active Liberal Democrat to the end. He attended every Liberal Assembly from 1953 until 2017, a record. The high point of his influence inside the party was as political secretary to Jeremy Thorpe from 1967 to 1973.
When the clouds of scandal later gathered over the Liberal leader, breaking in 1976, Moore was one of the last to remain convinced of his innocence. The most he would ever say against Thorpe was that “he was not very wise in his choice of friends.”
Richard Gillachrist Moore was born on February 20 1931, the younger son of Sir Alan Moore, 2nd Bt, and his wife Mary (née Burrows). When his parents took Jewish refugees from Hitler into their house in Sussex in the late 1930s, he developed a lifelong hatred of totalitarianism and an equally strong sympathy and admiration for the Jewish people.
Richard Moore’s wife Ann (née Miles) became a Liberal county councillor. She survives him, with their children, Charles, Charlotte and Rowan, all of whom are writers. Charles Moore also began as a Liberal; he later became the editor of The Daily Telegraph and authorised biographer of Margaret Thatcher.
Richard Moore, born February 20 1931, died May 15 2019