Mair Roberts was born in London, and trained at the Guildhall School of Music and the Italia Conti Stage School. She served her apprenticeship working in theatre, cabaret, pantomime and television. It was television that took Mair to Cardiff in 1966; a year later she married and settled on the outskirts of the city, and now has three daughters. In 1969 Mair formed a choir and has been its conductor since its inception; Cantorion Creigiau is a mixed choir of 85 voices and gives concerts regularly all over the country and has gained first prizes at the National Eisteddfod. The Choir also toured Hong Kong and also appeared in the Inter-Celtic Festival in Brittany.

In addition to this Mair continues to perform as a professional soprano singer. Combined with this Mair teacher singing, adjudicates at eisteddfodau and appears as guest conductor at cymanfaoedd ganu throughout the country.

Mair first performed with the Treorchy Male Choir in 1977 when she performed as soloist at the Choir’s concert in Llandaff Cathedral. Four years later Mair became the Choir’s regular soprano soloist and over the next 16 years she performed in 147 concerts – a record only beaten by baritone soloist Sam Griffiths.

In 1985 Mair toured Canada with the Choir and also accompanied them on their tour of Australia in 1986 where she charmed the audience at the Sydney Opera House.

Mair received Honorary Lady Membership of the Treorchy Male Choir in 2008.