 The concert and resulting recording went on to become the most successful live pairing of symphony orchestra and rock music to date and a worldwide best-seller, and even spawned a hit single, "Conquistador".In 1977, he arranged Mussorgsky’s "Pictures at an Exhibition" for piano and orchestra.In later years, he was Professor of Conducting at the Guildhall School of Music and Drama and Morley College, and regularly conducted the Royal Academy of Music Chamber Orchestra.