Mátyás Seiber has been played on NTS shows including The Opera Show, with Three Fragments From "A Portrait Of The Artist As A Young Man" first played on 22 November 2015.

Mátyás György Seiber (4 May 1905 – 24 September 1960) was a Hungarian-born composer who lived and worked in England from 1935 onward.

Seiber's music is eclectic in style, showing the influences of jazz, Bartók and Schoenberg. His output includes Ulysses (1947), a cantata on words by James Joyce and a clarinet concertino; scores to animated films, including Animal Farm (1954); a setting of the Scottish "poet and tragedian" William McGonagall's work, The Famous Tay Whale (written for the second of Gerard Hoffnung's music festivals); three string quartets; and choral arrangements of Hungarian and Yugoslav folk songs. He also wrote one opera, Eva spielt mit Puppen (1934), and two operettas, A Palágyi Pekek and Balaton.

Seiber used a pseudonym for his jazz works and popular music: G. S. Mathis or George Mathis (a rearrangement of his name using Anglicised forms), under which name he wrote for John Dankworth. He was awarded the Ivor Novello Prize for the song, "By the Fountains of Rome", which was a hit in 1956 in the UK Single Charts, making it to the Top Twenty. (The lyrics were by Norman Newell, and it was sung by David Hughes).