His catalogue comprises compositions spanning a diverse range of media, including orchestral, choral, concert band, brass band, ballet, instrumental and chamber, together with a substantial number of commercial orchestrations and arrangements. Ellerby’s works are published extensively and recorded on over 75 commercial CDs to date. Key performances include the BBC Promenade Concerts, Leipzig Gewandhaus, Barbican Centre, Royal Albert Hall, South Bank Centre and many major international festivals, including Edinburgh, Harrogate, Zurich and Kuhmo Chamber Music ( Finland).