Born in London to contralto Monica Sinclair and ROH horn principal Tony Tunstall, Angela began studying with her mother before enrolling at the Guildhall School of Music and Drama. 

 

After five years at the conservatoire, Angela concentrated exclusively on performing contemporary works. To date, her performances include Jerusha in Gerald Barry's 'The Intelligence Park' for the Almeida Festival, Berio in 'Circles, Folk Songs and Passaggio' with the Asko Ensemble, Dallapiccola in the Nieuw Ensemble's production of 'Commiato', the title character of Vic Hoyland's 'Crazy Rosa' with the Birmingham Contemporary Music Group,  Kagel in 'Kantrimiusik' with the Ensemble Modern & the London Sinfonietta, Loevendie in 'Turkish Folksongs', and Messiaen's 'Chants de Terre et de Ciel' with the Nederlands Blazers Ensemble.

 

Angela is perhaps best known for her work with Karlheinz Stockhausen. She first performed Stockhausen's 'Momente' in Birmingham in 1989, and was subsequently asked to perform it with the Asko Ensemble in the Concertgebouw. It was a huge critical success, and led to Stockhausen inviting her to create the role of Eva in his Opera 'Freitag aus Licht', premiered in Leipzig in 1996. Angela subsequently performed and recorded frequently under Stockhausen's direction, including 'Momente' for the WDR, and as Eva in the European tour of 'Freitag aus Licht'.

 

In 2003, Angela sang Isang Yun's 'Teile Dich Nacht' with the Nieuw Ensemble for the Edinburgh Festival, and in 2004 she sang George Crumb's 'Ancient Voices of Children' with the Paragon Ensemble. The following year, Angela premiered Gavin Bryars piece 'The Paper Nautilus', and two years later she took the lead soprano in David Heath's opera 'Everyday Occurrence', which was premiered with the 'McFall's Chamber Orchestra' in Scotland.

 

Angela has premiered many other new works, including Heath's Requiem 'The Beloved' - recorded live on 'Sirocco' for Black Box Records - as well as performing Luke Bedford's 'Good Dreams She Has', conducted by Oliver Knussen with the Birmingham Contemporary Music Group.