In old age, Bush continued to lead an active and productive life, punctuated by periodic commemorations of his life and works. In November 1975 his 50 years' professorship at the RAM was marked in a concert there, and in January 1976 the WMA gave a concert to honour his recent 75th birthday. In 1977 he produced his last major piano work, the "Twenty-four Preludes", Op. 84, of which he gave the first performance at the Wigmore Hall on 30 October 1977. A later reviewer described this piece as "music I'd like to have playing beside me as I sprawled on the grass beneath the trees with an ice-cream, watching a county cricket match on a golden afternoon".