Moore was also a self-taught xylophonist and pianist, as well as an accomplished composer. He was an amateur cricketer, golfer and chess player. In addition to many popular science books, he wrote numerous works of fiction. He was an opponent of fox hunting, an outspoken critic of the European Union and a supporter of the UK Independence Party, and he served as chairman of the short-lived anti-immigration United Country Party. He served in the Royal Air Force during World War II.