Gareth Glyn, who was born in Machynlleth, mid-Wales, is a full-time composer who has lived since 1978 on Anglesey – an island which, through its landscape, history and legends, continues to be a key influence on his work.

His hundreds of compositions include a symphony, concertos, overtures and other orchestral works, and a wide range of instrumental pieces from beginner to virtuoso standard.  He is considered one of Wales’s foremost choral composers, and some of his solo songs are part of the standard repertoire of some of his country’s leading singers.  His opera Wythnos yng Nghymru Fydd (‘A Week in a Future Wales’), which toured nationally in 2017, was judged Best Production in the Welsh Language in the Wales Theatre Awards 2018. Since then he has composed two further operas: Peth Bach ’di Cawr (‘A Giant’s a Small Matter’) and the opera-film Tanau’r Lloer / Fires of the Moon which was premièred in the Edinburgh International Film Festival in August 2025.