Related to the composer Sir William Walton, Martyn Bagnall was a student at Trinity College of Music, London, where he studied conducting under Charles Proctor, singing with James Gaddarn and Baroque and Renaissance Studies with Edgar Hunt. Whilst in London, he sang frequently for the BBC, on the South Bank, at St George′s Hanover Square and with the Tilford Bach Choir. On moving to Suffolk, he founded the Ipswich Chamber Choir and Orchestra and conducted the Choir and Orchestra in all of the classic choral repertoire; in its 21st anniversary year, he conducted the Choir in a specially commissioned piece by Sir Peter Maxwell Davies. For the culmination of the celebratory year, Martyn conducted a performance of Verdi′s Requiem at Snape Maltings with a combined choir of East Anglian singers and an orchestra and soloists drawn from alumni of Trinity College of Music.
Martyn has also sung at Ely Cathedral as a Lay Clerk and occasionally gives recorder recitals. In 2007, he moved to Dubai where he was Musical Director of the Dubai Divas for the 2008/2009 season.
He was appointed Musical Director of the Dubai Singers in 2009. In March 2010, he formed a choir to sing at the opening of the new Meydan Racetrack for the Dubai World Cup under the world-famous media composer Steve Sidwell. In May 2010, he conducted the premiere of Verdi′s Requiem in Dubai with soloists from The Royal Opera House, Covent Garden, an orchestra drawn from the UAE and a choir drawn from the GCC region. In March 2011, he was invited to conduct the Dubai Sinfonia at the Gala Opening of the Dubai Literary Festival. In December 2012, he conducted the Dubai premiere of Puccini′s Gloria and Vaughan Williams′ Five Mystical Songs with soloists from The Royal Opera House, Covent Garden, an orchestra drawn from the UAE and a choir drawn from the GCC region.
In March 2013, he was asked to train a chorus of 69 singers to accompany the world famous tenor Andrea Bocelli for a concert at the Du Arena in Abu Dhabi in front of a capacity audience of 10,000.